Abstract: An LGA connector assembly (1) includes an insulative housing (10), a plurality of terminals (12) received in the housing, a metal clip (40) having a pressing portion (421) assembled on the housing. The housing defines a first sidewalls (11) and a second sidewall (15) and two other sidewalls (16, 17) opposite to the first and second sidewalls respectively. The four sidewalls each define two protrusions (18, 19) extending from a corresponding inner face thereof. One protrusion defined on the first and second sidewalls is adjacent to the pressing portion and far away from a corner connecting the first and second sidewalls, the other protrusions each define on the corresponding corners connecting the sidewalls.

Abstract: An LGA socket includes a socket body (20) receiving a number of contacts (70), a stiffener (30) attached to the socket body, and a socket plate (40) and a load lever (50) respectively mounted to opposite ends of the stiffener. The socket plate has a connecting side (401) to connect the stiffener, a pressing side (402) to engage the load lever, and a pair of opposite lateral sides (403) respectively and integrally connected to the connecting side and the pressing side. The opposite lateral sides have a pair of clasping sections (4031) and a pair of accessorial pressing members (4032) adjacent the pressing side. The clasping sections and the accessorial pressing members can jointly press a top surface of the LGA package (60). Thus, reliable electrical connection between conductive pads on the LGA package and the corresponding contacts received in the socket body is ensured.

Abstract: An IC socket that is capable of obtaining stable, reliable electrical connections between an IC package and a socket housing, even in the case that the IC package is placed at a position shifted from a predetermined position on the socket housing then pressed, during connection of the IC package, without grinding down the peripheral wall of a mounting surface, onto which the IC package is mounted. Metal plates, for guiding the IC package, are provided on at least a portion of the peripheral wall that surrounds the mounting surface of the socket housing. The metal plates are of a shape such that they are coplanar with or protrude upward from an upper surface of the peripheral wall, and such that they are coplanar with or protrude inward from an inner surface of the peripheral wall.

Abstract: An electrical connector is disclosed to include an electrically insulative housing, which has relatively higher first stop walls and relatively lower second stop walls each defining with the first stop walls a respective terminal slot, first terminals mounted in the terminal slots and protruding over the first stop walls for the contact of an external electronic device, and second terminals mounted in the terminal slots and movable relative to the first terminals and partially protruding over the second stop walls for the contact of the first terminals upon loading of the external electronic device.

Abstract: An electrical connector for connection between a chip module and a circuit board is disclosed to include a housing defining a plurality of terminal slots, first terminals respectively mounted in the terminal slots, second terminals respectively mounted in the terminal slots and movable relative to the first terminals for compression contact with the first terminals respectively, a holding down cover for holding down the chip module on the terminal terminals, and a locking lever for locking the holding down cover.

Abstract: A pick-up cap (13) is provided for an LGA connector (12). The LGA connector includes a load plate (24) defining a rectangular opening (240) in a middle portion thereof and a pair of pressing portions (241) surrounding the opening. The pick-up cap defines a main body (32) and a pair of wings (34) extending from two opposite sides of the main body. A plurality of first projections (325) extends from one of the two rest sides of the main body. A resilient arm (326) extends from the other of the two rest sides of the main body. A second projection (324) is provided at two ends of the resilient arm, respectively. The pick-up cap further defines a tongue portion (35) extending from the side defining the first projections.

Abstract: A chip connector to be electrically connected to a chip. The chip connector includes an inner seat, terminals and an outer seat. The inner seat is formed with a plurality of terminal slots and a placement area in which the chip is placed. The terminals are respectively disposed in the terminal slots. Each terminal has an elastic arm, which has a connection point to be electrically connected to the chip. The outer seat has a bottom surface, a circumferential wall for enclosing the inner seat, a front end formed with a stationary pressing board for pressing a front end of the chip longitudinally, and two elastic arm portions extending backwards and formed at two sides of the outer seat. The elastic arm portions press the chip longitudinally and are elastically moved laterally to part from the chip.

Abstract: A module connector (100), to which a module body is electrically connected, includes an insulating housing (1), a number of contacts (2) received in the insulating housing (1), a shell (3) and a holding member (4). The insulating housing (1) defines a chamber (14) for accommodating the module body. The shell (3) is assembled onto the insulating housing (1). The holding member (4) cooperates with the shell (3) to securely accommodate the module body in the insulating housing (1), thereby electrically connecting the contacting portions of the contacts (2) with the module body accommodated in the chamber (14) of the insulating housing (1).

Abstract: An IC socket (1) includes an insulative housing (2) and large numbers of contacts (9) received therein. The housing defines arrayed contact receiving cavities (22) for accommodating the contacts. The cavities are arranged in array by first partition walls (24) and second partition walls (25), which are perpendicular to each other. The first partition wall is higher than the second partition wall. Each first partition wall is provided with protruding portions (240) and sunken portions (241), which are alternatively arranged.

Abstract: In some embodiments, a system includes a socket having a first set of socket contacts exposed on a first side of the socket and a second set of socket contacts exposed on a second side of the socket; and a frame comprising at least one surface to engage two lower surfaces of the second side of the socket. The two lower surfaces may be coupled by a lower corner surface of the second side of the socket, and wherein the lower corner surface does not engage the frame.

Abstract: A socket is adapted for electrically connecting a chip module and a printed circuit board, and the socket includes a main body having a base and a plurality of contacts arranged in the base for resiliently contacting with the chip module, wherein the base includes a foundation and two lateral sidewalls extending from the foundation; an upper lid movably connecting to the main body; and a lock member securing the upper lid and the main body together. Each of the two lateral sidewalls has a projection disposed on at least one corner of an upper surface thereof for abutting against the upper lid.

Abstract: A foldable SIM card connector includes a body, a cover pivotally assembled with the body and a plurality of terminals received in the body. A rear portion of the body defines a beam, a rejecting portion and a pair of stop arms. A rear portion of the cover forms a resisting board, a pair of stop boards and a pair of stop edges. While the cover is opened to a certain angle, the resisting board is located below and pressed against the beam of the body. The stop board is located behind and presses against the rejecting portion of the body. Besides, the stop arm contacts the stop edge of the cover. These mechanisms avoid the cover pressing the edge of the fixing cavity of the mobile phone, and further prevent the cover from being propped up and falling off.

Abstract: Lengths of arms of pressing members held at a lower end of an arm section of a cover member are determined in correspondence to the retention of semiconductor devices having contour dimensions different from each other, and are shorter than a length of the arm section so that part of the pressing members is projected outside through a recess of the socket body.

Abstract: To provide a connector for camera module use capable of preventing a defective contact of the connector. A connector for camera module use in which a camera module 12 is accommodated in a connector box 23, which is covered with a shield case, and engaged by an engaging member, the camera module 12 including: a solid image pickup element; a lens unit having a lens for guiding light to the solid image pickup element; and a lens holder by which the solid image pickup element is held, wherein a distance between the lens and the solid image pickup element is adjusted to a predetermined focal distance by the lens holder, and the connector for camera module use comprises a pushing member 21, and the pushing member 21 includes: an opening portion 21a formed at the center, the size of which is larger than that of the lens unit; leaf-spring-shaped elastic members 22, 22 . . .

Abstract: An LGA socket includes a socket body (10), a number of contacts planted in the socket body, a hollowed floating frame (50) floating on a number of push fingers (11) formed on the socket body, a stiffener (20) disposed right round the socket body and the floating frame, and a socket plate (40) and a load lever (30) respectively mounted to opposite ends of the stiffener. The floating frame is provided with a number of receiving sections (54) to hold an LGA package (60). The floating frame with the LGA package held thereon is vertically movable between a free state in which the conductive pads of the LGA package do not engage with the contacts, and a compressed state in which the conductive pads of the LGA package resiliently register with corresponding contacts. Thus, damage to the contacts during installation is avoided and reliable electrical connection is ensured.

Abstract: A test socket is provided for use in testing integrated circuits, especially integrated circuits in BGA packages. The test socket comprises a base member and a cover member configured to move vertically between an upper position and a lower position with respect to the base member. Springs are positioned between the base member and the cover member and configured to bias the cover member in the upper position. A lever is coupled to the base member and to the cover member and is configured to pivot to an open position when the cover member is in the lower position and to pivot to a closed position to confine an integrated circuit within the base member when the cover member is in the upper position.

Abstract: An integrated circuit (IC) package socket device that can receive two or more IC packages and the method of operating the device. Uses for the device include burn-in in which testing and programming of dies or completed IC packages. The device can also be arranged to receive two or more types of IC packages. A pressure unit is tiltably attached to the lid of the socket device providing a resilient normal force to each of the two or more IC packages without damaging the IC packages. The pressure unit has two or more pressure pads that correspondingly apply the resilient normal force to each of the two or more IC packages. The IC packages are received in recesses where the recesses are typically arranged in an array with the pressure pads in the pressure unit arranged so as to align with the array of recesses.

Abstract: A center processing unit (CPU) socket holds a CPU and has a base, multiple contacting tabs and multiple contacting tab holders. The base has a bottom, a seat, a cover and a latch. The seat is mounted in the bottom and has a recess. The contacting tabs are mounted in the recess in multiple lines and each contacting tab has a curved top contact end. The contacting tab holders extend up from the recess in seat and are aligned respectively with the curved top contact ends of the contacting tabs. When a CPU is installed in the CPU socket and presses against the contacting tabs, the contacting tab holders hold the curved top contact ends of the contacting tabs to avoid the vibration of the contacting tabs due to the transmission of the high frequency signals between the CPU and the CPU socket.

Abstract: Disclosed is a LGA socket connector including an insulative housing (2), a stiffener (3), a clip (4), and a lever (5) defining thereof a driving portion (50) and a locking portion (52) linked thereto. The stiffener is configured to grasp a periphery of the housing. The clip and the locking portion of the lever are essentially pivotally moved about longitudinal ends of the housing respectively, but with the driving portion disposed adjacent one transverse side of the housing. At least one of the clip and the stiffener is provided with a recessed region (300) adjacent said transverse side of the housing, thereby preventing the whole connector from becoming inclined when the connector is horizontally locked and placed on the printed circuit board.

Abstract: A test device for testing integrated circuits includes a lid and a base joined at a hinge and secured together with a latch. Within the base is some form of socket body that electrically connects the integrated circuit under test to the item the socket is mounted to (i.e. load board). Attached to the lid are cam ratcheting levers. A pressure plate is attached to cam ratcheting levers. The cam ratcheting levers provide a rotating means for lowering a pressure plate by the use of the cam groove within the cam ratcheting levers. The means for lowering a pressure plate may allow incremental lowering of a pressure plate through the ratcheting action of the cam ratcheting levers. The base may include a sight groove for examination of the integrated circuit and internal socket parts.

Abstract: A socket for an electrical part of the present invention has a socket body provided with an accommodation portion in which an IC package is accommodated, an open/close mechanism having a heat sink for performing radiation of heat of the IC package accommodated on the socket body, and a latch member for pressing the IC package accommodated on the socket body, in which opening and closing timings of the open/close mechanism and the latch member are set such that the latch member is first closed and the open/close mechanism is thereafter closed.

Abstract: An LGA connector includes an insulative housing with a plurality of electrical terminals received therein, a stiffener defining a cavity in a middle portion thereof for partially receiving the housing therein. The insulative house is generally rectangular-shaped, which defines a surrounding wall, each corner of the surrounding wall defines a stopper which protruding outwardly. In assembly, when the housing is pushed into the cavity of the stiffener to a predetermined position, the stoppers will abut against the bottom portion for preventing the housing from being excessively pushed into the cavity or being push out of the cavity in a underside direction.

Abstract: A socket connector (1) includes an insulative housing (2) and a plurality of terminals (7) received in the housing. The housing defines a plurality of passageways (24) for accommodating the respective terminals. Each passageway forms a step (248) therein for dividing the passageway into a receiving channel (246) and an interfering channel (242). Each terminal defines a fastening portion (70) for securing the terminal in the passageway and the fastening portion forms a pair of shoulders (703) for interfering with the receiving channel. When the terminal is installed into the housing via the corresponding passageway, the shoulders are spaced from the step for forming some clearance between the shoulders and the step.

Abstract: A cover comprises a first guide portion and a second guide portion. A side surface of the cover pivots to a case. When the cover closes, the cover mantles a moving component in a container of the case. The first guide portion is adjacent to a first side surface. When the cover opens, the first guide portion pushes the moving component to depart from a specific position in the container. The second guide portion is adjacent to a second side surface of the cover. When the cover closes, the second guide portion pushes the moving component to the specific position in the container. Moreover, in an electrical apparatus, a moving component is placed in a container thereof. The electrical apparatus includes a cover and a case in which the container is disposed. The cover has a side surface pivoting to the case. When the cover closes, the cover mantles the moving component in the container.

Abstract: A new land grid array socket (LGA, 100) provided according to a preferred embodiment of the LGA socket includes a base for receiving an integrated circuit (IC) package (200), a number of terminals (40) secured on the base, a pressing mechanism moveably attached on the base and being formed with at least one pressing portion (570) to securely press the IC package on the base. The at least one pressing asymmetrically pressingly engages with the IC package, thereby assuring uniform electrical engagement between the IC package and the terminals.

Abstract: A socket connector for an electronic package includes a socket housing and a loading caddy having a forward end and a rearward end. The forward end includes an opening dimensioned to receive the electronic package. The loading caddy is coupled to the housing for linear and rotational movement therewith. The loading caddy rotates through a first range of motion adapted to align the electronic package with respect to the housing, and descends linearly through a second range of motion to load the electronic package into the housing.

Abstract: The present invention provides a module connector including a housing having four sidewalls that define a chamber for receiving a module therein. Each sidewall defines a plurality of contact recesses. A plurality of contacts is accommodated in the contact recesses and electrically contact with the module. A pivotal cover has a top pressing cover, at least a pivotal arm and at least a locking claw extending downwardly from the top pressing cover. The pivotal arm pivotally mounts the pivotal cover on the housing to enable the pivotal cover to pivot between an open position to enable the module to be inserted in the chamber and a closed position with the top pressing cover pressing downwardly on the top of the module to prevent the module from being pulled out. The locking claw latches the pivotal cover in the closed position.

Abstract: A land grid array connector of an embodiment of the present invention includes an insulative housing, a stiffener harnessed on the housing, a load plate and a lever pivotally mounted to two ends of the stiffener. A pair of spaced securing portions extends from an end of the load plate, around which the load plate is pivotally mounted to the stiffener. The stiffener includes a support portion that corresponds to an end portion between the securing portions. The support portion extends upwardly and outwardly in a manner such that when the load plate is driven to an opened position, said end portion of the load plate is urged to be seated upon the support portion so as to limit the opening of the load plate with respect to the housing.

Abstract: In a connector for electrically connecting a mating object, a cover 12 is used for pressing the mating object against a contact 16 held by a housing 11. The cover is held on the housing 11 to be rotatable in a first direction and to be movable in a second direction intersecting the first direction. The cover is kept in a connected state by locking portions 14 and 21 which are engaged with each other in a direction opposite to the first direction and in the second direction. Upon disconnection of the mating object, the cover is rotated in the first direction to release the engagement of the locking portions and is moved in the second direction, thereby allowing the mating object to be disconnected.

Abstract: A pick up cap for LGA connector, the LGA connector has an insulative housing for receiving an electronic package such as CPU therein, a plurality of electrical contacts received in the housing. A clip disposed on the housing to press the CPU upon the contacts, and a pick up cap mounted on the clip. One detaching portion extends in a slantwise upward direction from one end of an extending portion, between said detaching portion and one side of said clip, there is a relatively broad rift which can supplies a sufficient operating place for an operator's fingertip to remove the pick up cap.

Abstract: An LGA connector includes an insulative base (2) mounted on a printed circuit board, a stiffener (3) defined around the base, a metal clip (4) pivotably engaged on the stiffener, and a lever (5) for fastening the clip onto the base. The clip includes a main plate (41) and a plurality of arched clasps (42), and the stiffener includes corresponding number of slots (321) in a side wall (32) for engaging with the clasps. The arched clasp defines a plurality of protrusions (422) for preventing the clip from moving horizontally.

Abstract: An IC socket includes a package guide member including a package receiving part configured to arrange a semiconductor device where a plurality of external connection terminals are arranged in a single plane surface at a designated position, a contact terminal having a tip arranged so as to correspond to a position of the corresponding external connection terminal when the semiconductor device is received in the package receiving part where the external connection terminals are situated at a lower side, a contact terminal supporting member situated separately from the package guide member, the contact terminal supporting member being configured to support the contact terminal, a wiring member configured to electrically connect to the contact terminal, a position adjustment mechanism configured to adjust and fix the position of the contact terminal supporting member to the package guide member, and a wiring unit having an electrode as corresponding to the wiring member, the wiring unit being fixed to a testing

Abstract: A latch device is used for a socket connector and includes a base, a pressing frame and a pressing rod. The pressing frame is pivotally connected to the base and has a flange on one side thereof. The pressing rod is pivotally arranged on the base and has a protrusion. The socket connector is arranged between the base and the pressing frame and a CPU is mounted on the socket connector. The pressing rod is operated such that the protrusion is pressed against the flange. The pressing frame is pressed against the CPU, whereby the CPU is also retained on the socket connector.

Abstract: In one embodiment there is disclosed a protective cover for a multi-pin electrical device socket. The socket, prior to having a device inserted therein, is covered with a cover having an inner surface facing the socket, a portion of the periphery of the inner surface of the cover contacting a frame having an open area surrounded by the frame structure. The inner surface of the cover has at least one protrusion thereon, with the protrusion adapted to contact an inserted electrical device thereby causing the cover to cease contacting at least one portion of the frame when the electrical device is installed in the socket.

Abstract: A land grid array connector for electrically connecting a CPU package (60) to a printed circuit board includes a housing (10) received a number of contacts (12) therein, a stiffener (20) enclosingly attached to the housing, a load plate (40) and a lever (30) pivotally mounted to opposite sides of the housing respectively. The housing has a number of sidewalls. Two wings (45) extend downwardly from opposite side edges of the load plate and toward the housing. A stopping member is formed on the wings of the load plate and two opposite sidewalls of the housing corresponding the wings, for resisting horizontal moving of the load plate and the CPU chip. The stopping member comprises a plurality of protrusions and holding sections engaging the protrusions. The protrusions each engagingly retained in a corresponding holding section during the connector being in closed position. This can resist horizontal moving of the load plate and the CPU chip.

Abstract: An electrical connector (1) for electrically connecting an electronic package with a circuit substrate. The connector includes a housing (11), a fastening device assembled with the housing, and a stiffener (12) surrounding the housing. The stiffener includes a back end (123), and a pair of spaced first walls (125) adjoining the back end. Each first wall has a latch (128) extending upwardly therefrom, and then bends inwardly. The back end has a pair of spaced spring fingers (129) extending substantially horizontally, and then bends slightly upwardly. The latches are fastened to the housing for locating the housing in a vertical direction. The spring fingers abut against the housing for locating the housing in a horizontal direction. The stiffener reinforces the housing, and protects the housing from deformation or warpage.

Abstract: A test connector (1) includes a base (10), a cover (20), a metallic stiffener (70), two operating members (60), and a lid (30). An opening (703) is defined in the stiffener for receiving the cover therein. Two spaced projections (704) are formed on one end of the stiffener. Two receiving grooves (705) are defined in bottoms of the projections respectively. Each operating member comprises a first operating lever (601) engaged with the receiving grooves via a first shaft (603), and a second operating lever (602) engaged with the base. The lid is engaged with the operating members for pivotably moving the first and second operating levers so that the operating members actuate the stiffener and the cover to move. When the cover moves to make the terminals connect a CPU during applying an unduly force on the lid, the metallic stiffener can protect the plastic cover from damage.

Abstract: Described is a circuit assembly including a circuit board including a connector, a card connectable to the connector and an apparatus securing the card to the connector, wherein the apparatus includes a front portion in substantially close contact with the card and a back portion in substantially close contact with the card, the apparatus being coupled to the circuit board.

Abstract: An land grid array (LGA) connector assembly comprises an insulative frame, a plurality of contacts received in the insulative frame, a reinforcement covering a circumference of the insulative frame, a clip assembled on the reinforcement and a lever mounted to the reinforcement and engaging with the clip. The clip is formed with a pivotal portion pivotally assembled on the reinforcement. The pivotal portion has at least one stopping portion on a edge thereof, the stopping portion is extending towards the insulative frame and abuts against the insulative frame to prevent the clip from moving flatly when the clip is in a close position.

Abstract: A socket cover with a recessed center, method for using such a socket cover and system using such a socket cover are described herein.

Abstract: An electrical connector having a terminal crossing over two adjacent terminal slots includes a base formed with terminal slots, and terminals disposed in the terminal slots. Each terminal has a fixing portion, an elastic arm and a pin. The fixing portion is clamped and positioned by the slot. The elastic arm has a lower arm and an upper arm. A bottom of the lower arm is connected to a bottom of the fixing portion. The lower arm extends from bottom to top. A top of the lower arm and the fixing portion define a gap. The upper arm extends, from the top of the lower arm, slantingly upwards through a top of the fixing portion to the adjacent terminal slot. A connection point is disposed near a distal end of the upper arm. The pin is positioned under the fixing portion and extends over a bottom of the base.

Abstract: A jig for precisely orientating a CPU over a socket of a connector comprises a frame, a limiting portion, an elastic portion and a positioning portion. The frame has an opening. The limiting portion and the elastic portion are formed on the frame. When the CPU is received in the opening, the limiting portion contacts a non-contact surface of the CPU, and the elastic portion presses the sides of the CPU. The positioning portion is formed on the frame and limits the movement of the frame relative to the socket when the CPU is received in the opening and the frame is put on the socket. Therefore, the CPU is precisely positioned over a transmission section of the socket, and a contact surface of the CPU contacts the transmission section of the socket.

Abstract: A land grid array socket comprises an insulative housing having a plurality of contacts. The insulative housing has a top surface for receiving a land grid array package. A cover member is pivotally mounted on a first end of the insulative housing. The cover member is pivotal between an open position and a closed position where the cover member presses the land grid array package toward the top surface of the insulative housing so that the land grid array package electrically connects to the contacts. A lever is pivotally mounted on a second end of the insulative housing. The lever has a locking portion for locking the cover member in the closed position. A metallic reinforcing plate is positioned on a bottom surface of the housing. The metallic reinforcing plate extends between the first end and the second end of the insulative housing.

Abstract: A test device includes a test receptacle from which projects contact elements project and spring contacts that can be electrically contact-connected to the external contacts of an integrated circuit type. Corresponding to the external contact positions of the integrated circuit type, the test device includes module components having at least one electrically conductive contact plate and having an insulating carrier plate, the contact plate being incorporated in cutouts of the carrier plate and having a contact section, a spring section and a holding section.

Abstract: An electrical connector includes an insulating housing having a frame and a plurality of slots formed thereof; a plurality of contacts receiving in the slots partially and having a contacting portion higher than the slots; a pair of levers having an operation portion, a shaft portion and a press portion; and at least one metallic orientation member secured at the shaft portion thereof for rotating the operation portion to enable the press portion downwardly so as to force a chip module, thus the chip module electrically connecting the contacts.

Abstract: A smart card connector has a housing (11) formed by an insulative contact holder (12) and a sheet metal cover (14) that has an upper plate (46) lying above an upper face of the contact holder, to form a card-receiving cavity (30) between them. A wire spring (16) has a spiral wound planar main portion (141) that is mounted to lie on the upper surface of the sheet metal upper plate (46). The wire spring has a first end portion (144) fixed to the cover and has a second end portion (158) with a right angle bend (160) leading to a downwardly-extending ejection spring part (162). The ejection spring part extends though a slot (66) in the cover upper plate portion and into the cavity to lie in the path of the card leading edge.

Abstract: A socket for an electrical part comprises a socket body to which an electrical part is mounted, a slide plate provided for the socket body to be movable so as to deform the contact portions of a contact pin provided for the socket body, and a driving mechanism provided for the socket body to move the slide plate. The driving mechanism includes a pair of lever members each having a force applying portion through which a force is applied to the slide plate and the force applying portion is disposed at substantially a central portion on a side portion of the slide plate in the slide plate moving direction.

Abstract: A guide member is supported to be movable relative to an accommodation portion of a contact-moving member An engagement pin is engaged with a post portion so that the maximum displacement of the guide member is limited within the maximum displacement of a semiconductor element. The inner circumference of the accommodation portion of the contact-moving member is brought into contact with the outer circumference of the guide member so that the maximum displacement A of the contact-moving member is limited. Thus, a gap CL (=A?B) is defined between the inner circumference of the contact-moving member and an end surface of the guide member opposed thereto.

Abstract: The present invention relates to interchangeable module sockets and socket assemblies for accommodating modules of different form factors.

Abstract: An LGA connector (1) comprises a housing (11) for receiving a number of contacts (12), a stiffener (13) partly covering and reinforcing the housing. The stiffener comprises a pair of lateral sides (130), a front end (131) and a rear end (132), and a central cavity (133) disposed therebetween. The sides, the front end and the rear end each define a bottom wall (134) thereof, thereby around the central cavity. A plurality of separately and uniformly protrusions (135) is formed on a bottom surface of the bottom wall. The protrusion and the bottom wall are integrally formed as a single piece by stamping. Thus, the connector is soldered on a circuit board (3) via solder balls (16, 17) on the contacts and the protrusions, thereby preventing the connector from inclining downwardly during in reflow process because of the connecting force between the connector and the board increased.