Abstract: A two part encapsulated cementing system is surface mixed and then placed downhole in a method of remediating an active well. This mixture is then placed downhole where it is allowed to degrade in the well fluid allowing for the formation of a cement plug.

Abstract: A two part epoxy resin system is surface mixed in a method of primary cementing a well. This surface mixed epoxy resin is then placed in the annulus of the well. Finally, the mixture in situ forms a hard impermeable mass.

Abstract: The present invention provides an apparatus and method of orienting perforating gun strings conveyed on a tool string. One embodiment of the present invention provides an orienting weight provided in a portion of the perforating device, such as the shaped charge, the loading tube or the gun housing. An adapter is provided intermediate the tool string that facilitates conveyance of the gun string downhole. Additionally, the adapter enables the gun string to rotate independent of the tool string.

Abstract: A technique provides an electric submersible pumping system to facilitate a well treatment, such as a hydraulic fracturing well treatment. The electric submersible pumping system is positioned downhole and oriented to intake a fluid delivered downhole for use in the well treatment. Once the fluid is delivered downhole, the electric submersible pumping system pumps, pressurizes and discharges this fluid to perform the well treatment, e.g. the hydraulic fracturing treatment. The pumping system reduces the pressure at which the treatment fluid must be delivered downhole.

Abstract: The present disclosure relates to a system and method for producing a well-fracturing gel using a gel concentrate such that the method and system are capable of timely adjusting the properties of the gel on the fly just prior to introducing the gel into the well. Further, the present disclosure provides for producing a gel with an overall shorter production time as well as adjusting the properties of the gel just prior to injecting the gel into the well.

Abstract: A system comprising a surface installation in position above a plurality of subsea wells disposed within the watch circle of the surface installation. A plurality of flowlines directly couple at least one of the plurality of subsea wells to the surface installation. A control station, a hydraulic power unit, and an injection unit are disposed on the surface installation. A distribution body is disposed on the seafloor and is coupled to each of the control station, hydraulic power unit, and the injection unit via one or more umbilicals. A first wellhead component is disposed on one of the subsea wells and is coupled to the distribution body via one or more flying leads that provide electrical, hydraulic, and fluid communication. A second wellhead component is disposed on another one of the subsea wells and coupled to the distribution body via one or more flying leads that provide electrical, hydraulic, and fluid communication.

Abstract: In one illustrative embodiment, the present invention is directed to a device adapted to be positioned adjacent an end of a tool housing of a subsea lubricator, wherein the device includes a structural member that is adapted to be positioned adjacent an end of the tool housing, a non-metallic body coupled to the structural member and a sealing device that is adapted to sealingly engage a wireline extending through the sealing device. The present invention is also directed to a method which includes lowering an assembly toward a tool housing of a subsea lubricator positioned subsea using a wireline for the tool to support a weight of the assembly, wherein the assembly includes a wireline tool and a device including a structural member that is adapted to be positioned adjacent the end of a tool housing, a non-metallic body coupled to the structural member, and a sealing device that is adapted to sealingly engage a wireline extending through the sealing device.

Abstract: In one embodiment, the present invention relates to a riser apparatus for use in offshore drilling for oil or other fossil fuels, the riser apparatus comprising: a plurality of riser sections coupled serially end-to-end, wherein each of the riser sections comprises: a tube having a first end and a second end; a first flanged that is mechanically joined to the first end of the tube; a second flanged that is mechanically joined to the second end of the tube; wherein the tube is constructed of an aluminum alloy; and wherein the flanges are constructed of the aluminum alloy; and wherein the riser apparatus has a length of approximately 1,500 meters or greater.

Abstract: A system for mitigating slugging in the conveyance of hydrocarbons in a flowline includes a first portion of flowline that extends substantially longitudinally along a declining surface. The first flowline portion carries multiphase hydrocarbons. A second portion of flowline extends upward from adjacent the first portion of flowline, and is in fluid communication with the first portion of flowline. A slug-mitigating region is between the first and second portions of flowline so slug-mitigating assembly receives the hydrocarbons from the first portion of flowline and conveys the hydrocarbons to the second portion of flowline. The slug-mitigating region has consecutively joined tubular segments that are each arcuate along a predetermined arcuate angle, with substantially uniform cross-sections. The first portion of flowline can be a subsea flowline extending along a sea floor, and the second portion of flowline can be a riser.

Abstract: The present invention is directed to a modular actuator for subsea valves and equipment, and various methods of using same. In one illustrative embodiment, the actuator includes a hydraulic actuator, at least one housing and a self-contained hydraulic supply system positioned within the at least one housing.

Abstract: A technique utilizes shape memory materials in wellbore applications. Well components are formed with shape memory materials able to transition to a desired state when activated. The well components are moved downhole with the shape memory material in one state. Upon introduction of an activating agent, the automatic transition of the shape memory material is initiated and the well component is changed to a state in which it is able to perform a desired downhole function.

Abstract: Apparatus and methods are provided to prevent an operator from inadvertently dropping a string into a wellbore during assembling and disassembling of tubulars. In one embodiment, an interlock system is used to control the operations of a gripping apparatus connected to the top drive and a spider such that at least one of the top drive or the spider retains the tubular. The interlock system allows the spider to open when the gripping apparatus is supporting a load of the tubular or is in position to support a load of the tubular.

Abstract: A single well servicing combination unit comprising: a hydraulic manifold removably connectable to the power-take-off of a power source to drive a plurality of hydraulic pumps and motors that control a plurality of well servicing modules that are removably mounted on said combination unit, said well servicing modules being interconnectable by plumbing.

Abstract: A control line positioning apparatus (10) comprising a retainer arm (30), having a control line retainer thereon, is driven between a removed position with the retainer arm (30) positioned adjacent to a base and adjacent to a rig floor and a raised position with the retainer arm (30) raised by a drive member to a raised position to hold one or more control lines (90) along a portion of the length of a pipe string (80) to facilitate application of a clamp to secure the control lines to the pipe string (80). In one embodiment, the retainer arm (30) may be releasably secured to a docking assembly (50) disposed adjacent to the pipe engaging apparatus and adjacent to a rig floor. In one embodiment, the control line positioning apparatus may comprise an ascending control line pathway (112) comprising a plurality of rolling members to direct one or more control lines to a retainer assembly.

Abstract: A technique for deploying a communication line in a tubing used in a wellbore. The communication line is positioned within the tubing which may be used to deploy a well device into a wellbore. Additionally, a reactive material is placed into the tubing. The consistency of the reactive material may be selectively changed so as to fill space between the cable and the tubing, thus providing support for the cable and/or pressure isolation along the tubing.

Abstract: A safety system in a motor vehicle is disposed in an engine compartment closable by means of a flap member. In order to increase the passive safety of the motor vehicle, containers filled with an extinguishing medium are disposed on an inner side of the engine compartment and, in the event of a limit temperature being exceeded, release the extinguishing medium.

Abstract: Overload protection device for agricultural appliances, such as for example agricultural implements with a joint connecting the agricultural tool to the carrier frame, said joint comprising two joint parts held together by spring load and mutually supporting, of which one is mounted on the agricultural tool and the other on the carrier frame, wherein on both joint parts at least one upper support arrangement and at least one lower support arrangement are arranged spaced from one another, characterised in that the lower support arrangement (9, 20) has at least one pivot bolt (10, 23) extending horizontally and transversely to the working direction and at least one joint retainer (11) supported on the pivot bolt (10, 23) and having a V or U-shaped cross-section.

Abstract: An agricultural machine including a chassis, an engine, a driver's cabin, a hitch, and at least two working units connected to the hitch by a hitching frame. The at least two working units are configured to be pivoted between a working position in which the working units extend substantially horizontally and transversely to a direction of travel in work and a transport position in which the working units extend substantially over the chassis. The hitch is connected to the chassis via a rigid structure, the rigid structure connected to the chassis by a transverse articulation, at least one actuator being provided between the chassis and the rigid structure to allow the rigid structure to tip about the transverse articulation.

Abstract: A combination gardening tool that will perform as a cultivator, weeder, and hoe. The present invention has an elongated handle and a cultivator head at one end. The cultivator head is comprised of a row of cultivator tines and a cutting blade. The cultivator tines are of substantially equal lengths and extend substantially parallel to each other and have sharpened ends. The cutting blade is located substantially near the sharpened ends of the cultivator tines. The cultivator tines loosen and break up the soil and the cutting blade slices the ground to sever weeds and vegetation. The cutting blade also performs as a conventional hoe which is used to hack, chop and remove unwanted foliage and vegetation. In addition the width of the cutting blade is sufficient enough to effectively move soil, make garden rows, make furrows, and level the ground surface working area.

Abstract: The present invention relates to an upper link (32) for a utility vehicle, in particular for an agricultural tractor. The upper link (32) has a hydraulic cylinder (34) for adjusting the upper link (32). Furthermore at least one fluid tank (36), to which the hydraulic cylinder (34) can be coupled, is provided so that in the coupled condition hydraulic fluid limited to a pre-determined volume can be exchanged between the hydraulic cylinder (34) and the fluid tank (36) and so that a piston (40) of the hydraulic cylinder (34) can move in floating fashion by a distance (ls) corresponding to the pre-determined volume in the hydraulic cylinder (34). Furthermore the present invention relates to a front-end as well as to a back-end three-point hitch of a utility vehicle with two pivotally connected lower links and an upper link with such a fluid tank.

Abstract: A bearing shield and disk scraper system to remove and deflect dirt, debris, and soil from a bearing assembly, rigid bearing hanger or standard, and/or disk blade, is provided; the system also provides a protective barrier structure for the bearing assembly. The bearing shield and disk scraper system includes a shield member and a scraper blade connected thereto. The bearing shield at least partially encases and protects a bearing assembly that rotatably supports a common axle which carries multiple disk blades of the disk gang. The scraper blade is attached to the shield member by way of a mounting flange that extends therefrom. An edge of the scraper blade is positioned in close proximity to a concave surface of an adjacent disk blade, whereby the entire assemblage of bearing shield and disk scraper system protects the bearing assembly and prevents non-desired accumulation of dirt and debris on the disk blade.

Abstract: A device for removing obstructions from a work site. The device is attachable to the front of a work machine. The device comprises a frame, a flange, a rotatable cutting member supported on the flange, and a means for rotating the cutting member. The flange is non-rotatable, but is movable along at least one length relative to the frame. The means for rotating the cutting member may be supported on the flange, and comprises a motor and gearbox or similar equipment. The device further comprises a plurality of removably attachable blocking members for decreasing the range of travel of debris generated during operation of the cutting member.

Abstract: A cushion standard shield system to remove and deflect residue, dirt, debris, and soil from a cushion bearing hanger, or cushion standard, portion of a disk gang type agricultural implement is provided. The cushion standard shield system includes a mounting bracket supported by a common axle which carries multiple disk blades of the disk gang. A blade assembly is mounted to an upright portion of the mounting bracket, and is positioned generally behind and above the axle, behind the cushion standard. The blade assembly includes one or more plate member with arcuate lateral edges. The radii of the arcuate lateral edges correspond closely in magnitude to the radii of the concave and convex surfaces of the disk blades. The plate members are laterally adjustable with respect to each other, whereby the width dimension of blade assembly is variable to accommodate different axial spacing widths of adjacent disk blades.

Abstract: A powered hammer includes a housing, a tool holder coupled to the housing and configured to hold a tool, a motor within the housing, a cylinder disposed within the housing, and a piston slideably mounted within the cylinder. A drive mechanism converts rotary output of the motor into a reciprocating motion of the piston. The drive mechanism includes a crank shaft rotationally driven by the motor, a drive pin eccentrically mounted on the crank shaft, and a con rod with a first end connected to the drive pin and a second end connected to the piston. A ram is slideably mounted forward of the piston that is reciprocatingly driven by the piston. A beat piece is slideably mounted forward of the ram. The beat piece is repetitively struck by the reciprocating ram, which in turn repetitively strikes an end of the tool when held in the tool holder to transfer the momentum of the ram to the tool. Lubrication fluid covers at least part of the drive mechanism.

Abstract: Dual-character shock-isolation structure, and associated methodology, for minimizing the transmission of shock through a connective interface existing between a pair of interconnected structures, such as between the handle of an impact-delivering tool and a user's hand and arm. The proposed structure includes kinetic-energy-to-heat cushioning structure, and twin-layer, facially releasably, interengaged shear-lock structure operatively joined to, and positioned in shock-transmission series with, the cushioning structure.

Abstract: A right-handed and reverse air channel button for a pneumatic tool includes a basic body, at least one operating member and two air intake passageways. The basic body is pivotally positioned in a positioning hole of the base of a pneumatic tool, the operating member is secured at one side of the basic body and the air intake passageways are bored in the annular wall of the basic body. When the operating member is turned to actuate the basic body to rotate for a preset angle, the air intake a passageways will respectively correspond to an air intake channel and two guide channels of the base, which communicate with the positioning hole. Thus, air can pass through the basic body and get into the base to drive the pneumatic tool to rotate clockwise or counterclockwise, able to control the air amount, easy in assembly and convenient in operation.

Abstract: An apparatus is provided comprising a chassis of a sheet of an electrically conductive material having a substantially non-conductive coating. An exposed portion of the chassis can be deformed to provide at least one protrusion such that the non-conductive coating on the at least one protrusion is thinner than a portion of the sheet spaced apart from the at least one protrusion to provide a conductivity path through the sheet.

Abstract: An electrical box and cover that includes a body having a back wall, a face plate and a perimeter wall which define an interior and an exterior for the body. The back wall has one or more removable elements for forming apertures that can be used to mount connectors. The faceplate has an opening for accessing the interior that extends beyond the perimeter wall to expose a slot. The cover is connected to the body by one or more hinges and is pivotably movable between an open and closed position. When the cover is in the open position, it can be retracted into the housing. A housing extending from the rear of the face plate on the exterior of the body receives the cover. The cover can include a rail on the interior surface and the perimeter wall can include a track that receives the rail when the cover is retracted into the box.

Abstract: One aspect of the invention is an outlet box frame for installation in a hole in a floor structure. The hole having a perimeter and defining an internal wall surface in said floor structure. The frame including a walled member, at least one flange portion and a unitary retaining screw guide. The walled member being sized for insertion within the hole. The at least one flange portion extending outward from the walled member, wherein once installed at least a portion of the flange extends from the walled member past the internal wall surface. The unitary retaining screw guide supports a retaining screw. The screw guide being supported from the walled member and configured to receive the retaining screw therein. Upon installation, the retaining screw inserted in the retaining screw guide engages the hole wall without significant penetration thereof, providing at least pullout resistance of the frame from the hole. Alternatively, the outlet box frame may include the retaining screw.

Abstract: An electrical component box which can be provided under a maintenance opening in an engine compartment on a water vehicle, can include a box body provided with an electrical unit and a cover member. The box body can be attached to a bulkhead so that a mounting surface for an electrical unit extends generally vertically. Engaging frames can be provided on the upper face of the box body. Also, engaging clamps can be provided on the upper side of the cover member to be engaged with the engaging frames by one-touch operation. A bottom cover can be provided under the box body to cover the bottom side of the electrical unit and the upper side, both lateral sides and the front side of the electrical unit can be covered by the cover member.

Abstract: An electrical box for housing electrical components that includes: a body having a back wall, a face plate, a perimeter wall therebetween and an interior. The back wall has one or more removable elements for forming apertures that receive one or more low voltage connectors. A cover fits over an opening in the face plate and one or more rotatable mounting brackets located near the end walls are used to mount the box in a wall.

Abstract: An angled electrical adapter comprises a housing having opposing ends and formed into an angled configuration. The housing further comprises a plurality of conduits from one of the ends to the other. An electrical conductor is provided in each conduit. Each end of the housing is adapted to receive a connector of a removable electrical cable.

Abstract: Provided herein are flexible, low friction innerduct structures configured to contain at least one cable within a conduit. The innerduct structures, or conduit inserts, include one or more strip-shaped panels of flexible material that are joined to define at least one channel through which a cable can extend. The innerduct structures preferably are formed from a woven textile fabric having warp yarns that are monofilaments and fill yarns that are an alternating pattern of monofilament yarns and multifilament yarns. Such construction increases the flexibility of the fabric, as compared to previous innerduct fabrics, resulting in a reduction of the pulling force required to draw the cable through the innerduct and into position.

Abstract: The present invention includes a high performance communications cable that provides for wireless fidelity applications and includes core support-separators having profiles which define a clearance to maintain spacing and/or channel between the transmission media and power conductors. The core may be formed of a conductive or insulative material that have, principally, polymer blends that include olefin and/or fluoropolymer and/or chlorofluoropolymer based resins. The polymer blends can also be utilized for fabricating shielding materials. The core support-separators have both a central region as well as a plurality of shaped sections that extend outward from the central region that are either solid or partially solid, foamed or foamed with a solid skin surface.

Abstract: Communication cable is provided comprising a twisted pair of polymer insulated conductors, the twisting to form the twisted pair forcing the surface of polymer insulation of each polymer-insulated conductor of said polymer-insulated conductors into contact with one another, the polymer insulation of each polymer-insulated conductor including (i) a foamed portion being crushable by the forcing together of the contacting surfaces of the polymer insulation of each of the polymer-insulated conductors and (ii) a crush-resistant portion extending radially within said insulation into the foamed portion and being present where the surface of the polymer-insulated conductors are into said contact with one another, thereby protecting the foamed portion from crushing by the forcing together of the contacting surfaces.

Abstract: A process for preparing a photoimprinted film, a composition for forming a photoimprinted film and a photoimprinted film comprising a dielectric constant of less than about 3.5. The method includes providing a material film having a composition including at least one silica source capable of being sol-gel processed, at least one photoactive compound and at least one solvent; and water. The composition contains less than about 0.1% by weight of an added acid. A mold having mold features is provided. The mold is positioned in sufficient contact with the material film to allow the material to contact at least a portion of the mold features. The material film is then exposed to a radiation source and the film is cured to form a solidified material film. The mold is separated from the solidified material, wherein the material includes film features corresponding to the mold features.

Abstract: A positive differential signal trace and a negative differential signal trace are formed on different layers of a printed circuit board. A first ground trace is formed on the layer on which the positive differential signal trace is formed, and a second ground trace is formed on the layer on which the negative differential signal trace is formed. An insulation layer is positioned between the two layers and has a predetermined thickness. A differential mode impedance and a common mode impedance of differential signals are dependent on the predetermined thickness of the insulation layer, width and thickness of each differential signal trace, and a space between each differential signal trace and the corresponding ground trace formed on the same layer.

Abstract: An electronic device includes a circuit board and a power connection interface. The power connection interface is formed on an edge region of the circuit board. The power connection interface includes a first trace portion for transmitting a DC voltage and second and third trace portions for transmitting an AC voltage. Plural trace wires of the first trace portion are arranged on first and second surfaces of the edge region. The second and third trace portions are arranged on opposite surfaces of the edge region.

Abstract: An exemplary method for manufacturing a printed circuit board is provided. In the method, firstly, a circuit substrate having a substrate and a number of soldering pads is provided. Secondly, a protective layer is formed onto the circuit substrate in a manner such that the soldering pads are entirely covered by the protective layer. Fourthly, a laser beam is applied onto portions of the protective layer spatially corresponding to the soldering pads in a manner such that the portions of the protective layer is removed, thereby exposing the soldering pads to an exterior. A printed circuit board having a protective layer with high precision of resolution is also provided.

Abstract: A method of manufacturing a circuit board that includes: forming a conductive relievo pattern, including a first plating layer, a first metal layer, and a second plating layer stacked sequentially in correspondence with a first circuit pattern, on a seed layer stacked on a carrier; stacking and pressing together the carrier and an insulator, such that a surface of the carrier having the conductive relievo pattern faces the insulator; transcribing the conductive relievo pattern into the insulator by removing the carrier; forming a conduction pattern, including a third plating layer and a second metal layer stacked sequentially in correspondence with a second circuit pattern, on the surface of the insulator having the conductive relievo pattern transcribed; removing the first plating layer and seed layer; and removing the first and second metal layers, can provide a circuit board that has high-density circuit patterns without an increased amount of insulator.

Abstract: The present invention provides a circuit board structure having an embedded capacitor and a method for fabricating the same. The circuit board structure includes a core layer board with at least one surface having non-penetrating first and second grooves, a circuit layer and a first electrode plate formed in the first and second grooves of the core layer board respectively and being flush with the core layer board; a high dielectric material layer formed on the core layer board, the circuit layer and the first electrode plate; a second electrode plate formed on the high dielectric material layer and corresponding to the first electrode plate, thereby forming a capacitor by the first and second electrode plates and the high dielectric material layer. The high dielectric material layer is formed on a plane surface so as to eliminate poor filling and improve reliability.

Abstract: The connection resistance between a metal bump (8) and a metal layer (10) for forming a wiring film deposited later is further decreased, the connection stability is enhanced, the wiring path passing through the metal bump (8) is further shortened, the planarity is enhanced, and the metal bump (8) does not come out easily. A wiring film interconnecting member wherein a plurality of pillar-like metal bumps (8) composed of copper and having a cross-sectional area of the top surface smaller than that of the bottom surface and interconnecting the wiring films of a multilayer wiring board are buried in an interlayer insulation film (10) in such a way that at least one end projects. The upper surface of the interlayer insulation film (10) is so curved as to be high at a part in contact with the metal bump (8) and lower gradually as being farther therefrom.

Abstract: The invention discloses a PCB (100, 400) with first and second main surfaces (110, 130), the PCB also having a first height, h, said two surfaces and height together defining the volume of the PCB. The PCB comprises layers (430, 434, 438) of a first supporting laminate material, layers (440, 431, 433, 435, 437, 439) of a first conducting material and layers (432, 436) of a first prepreg, said first materials and prepreg having respective dielectrical constants and dissipation factors. In the PCB, a sub-volume of the PCB defined by a sub-area (120) within the first main surface and a sub-height (h?) within said first height together comprise a sub-PCB (320) which comprises at least one layer (330, 334) of a second supporting laminate material, said second laminate material differing from the first laminate material with regard to at least one of the factors dielectrical constant and dissipation factor.

Abstract: A voltage-operated layer arrangement having a substrate (1), a layered structure (2, 3, 4) that is applied to the substrate and comprises at least one continuous functional layer (2) that is arranged between a first (3) and a second (4) electrode, and a magnesium covering layer (15) that is applied to the second electrode (4) arranged on the side of the layered structure remote from the substrate, for the encapsulation of one or more particles (13).

Abstract: A composite layer composed of an Ni layer and a Pd layer is formed on a solder pad, and a solder on the composite layer is composed of a solder containing no lead. Because a Pd layer (palladium layer) reduces phenomenons such as repellency of the solder, adhesiveness with the solder can be enhanced. Because a Pd layer has a higher degree of rigidity than a gold layer, thermal stress is absorbed into the Pd layer and buffered so as to reduce the degree of transmission of stress to the solder bump, or to the solder layer, by thermal stress.

Abstract: Provided are processes for making a transparent conducting pattern. The invention is also directed to electronic devices containing such transparent conducting patterns. Further provided is a substrate comprising a base film and a transparent conducting layer disposed on the base film; wherein the substrate has an OD of about 0.1 to 0.6 at 830 nm, and the transparent conducting layer comprises polyethylene dioxythiophene and has an OD of less than 0.1 in the range of 400 to 700 nm.

Abstract: A metal wiring plate includes a soldering portion to which an electronic device is soldered and a wiring portion extending from the soldering portion and configured to electrically connect the electronic device to other device. The wiring portion includes a narrow portion located adjacent to the soldering portion. The width of the narrow portion is less than the width of the soldering portion so that the narrow portion helps prevent melted solder applied to the soldering portion from spreading to areas outside the soldering portion. The narrow portion allows the electronic apparatus to be surely soldered to the soldering portion without using solder resist.

Abstract: Disclosed herein is a carrier member for transmitting circuits, which is a component of a coreless printed circuit board having circuit patterns embedded therein, and which can be used to provide a high-density and highly reliable printed circuit board by forming protrusions only on the lower ends of the circuit patterns, a coreless printed circuit board using the carrier member, and methods of manufacturing the carrier member and the coreless printed circuit board.

Abstract: An electromagnetic bandgap structure and a printed circuit board that solve a mixed signal problem are disclosed. In accordance with embodiments of the present invention, the electromagnetic bandgap structure includes a first metal layer; a first dielectric layer, stacked in the first metal layer; a second metal layer, stacked in the first dielectric layer, and having a holed formed at a position of the second dielectric layer; a second dielectric layer, stacked in the second metal layer; a metal plate, stacked in the second dielectric layer; a first via, penetrating the hole formed in the second metal layer and connecting the first metal layer and the metal plate; a third dielectric layer, stacked in the metal plate and the second dielectric layer; a third metal layer, stacked in the third dielectric layer; and a second via, connecting the second metal layer to the third metal layer.

Abstract: The present invention provides a multilayer printed wiring board having a filled viahole structure advantageously usable for forming a fine circuit pattern thereon, and having an excellent resistance against cracking under a thermal shock or due to heat cycle. The multilayer printed wiring board is comprised of conductor circuitry layers and interlaminar insulative resin layers deposited alternately one on another, the interlaminar insulative resin layers each having formed through them holes each filled with a plating layer to form a viahole. The surface of the plating layer exposed out of the hole for the viahole is formed substantially flat and lies at a substantially same level as the surface of the conductor circuit disposed in the interlaminar insulative resin layer. The thickness of the conductor circuitry layer is less than a half of the viahole diameter and less than 25 ?m.