Abstract: A semiconductor device includes a plurality of channel layers vertically separated from one another. The semiconductor device also includes an active gate structure comprising a lower portion and an upper portion. The lower portion wraps around each of the plurality of channel layers. The semiconductor device further includes a gate spacer extending along a sidewall of the upper portion of the active gate structure. The gate spacer has a bottom surface. Moreover, a dummy gate dielectric layer is disposed between the gate spacer and a topmost channel layer of plurality of channel layers. The dummy gate dielectric layer is in contact with a top surface of the topmost channel layer, the bottom surface of the gate spacer, and the sidewall of the gate structure.

Abstract: The present disclosure illustrates a fastening device including a sleeve, a rotary knob device and a drive cap. The sleeve is formed with a through-hole which defines a rotation space at a side thereof. A fastening part and a position-limiting ring are formed on an outer side of the sleeve, and the position-limiting ring includes multiple position-limiting fastening grooves on a periphery thereof. The rotary knob device includes a rotary rod movably inserted through the through-hole. The assembly space of the sleeve is formed with a sliding inner hole for covering the position-limiting ring of the sleeve, and the position-limiting ring is longitudinally movable in the sliding inner hole, and the sliding inner hole includes two long protrusion rods and two short protrusion rods formed on the sidewall thereof and separately fastened in the position-limiting fastening grooves. Therefore, the fastening device can be operated for locking or unlocking easily.

Abstract: The present disclosure illustrates a fastening device including a sleeve, a rotary knob device and a drive cap. The sleeve is formed with a through-hole which defines a rotation space at a side thereof. A fastening part and a position-limiting ring are formed on an outer side of the sleeve, and the position-limiting ring includes multiple position-limiting fastening grooves on a periphery thereof. The rotary knob device includes a rotary rod movably inserted through the through-hole. The assembly space of the sleeve is formed with a sliding inner hole for covering the position-limiting ring of the sleeve, and the position-limiting ring is longitudinally movable in the sliding inner hole, and the sliding inner hole includes two long protrusion rods and two short protrusion rods formed on the sidewall thereof and separately fastened in the position-limiting fastening grooves. Therefore, the fastening device can be operated for locking or unlocking easily.

Abstract: A holeless plate member riveting method for riveting a retaining member to a holeless plate member using a press by: placing the holeless plate member on a first die of the press and attaching a mounting structure of the retaining member to the holeless plate member opposite to the first die, and then attaching a cavity of a second die of the press to the retaining member, and then operating the press to stamp the second die against the retaining member and the first die, forcing a cutting edge of the mounting structure of the retaining member to cut into the holeless plate member to the extent where a toothed portion and annular locating groove of an engagement structure of the retaining member are kept in permanent engagement with a deformed part of the holeless plate member.

Abstract: A floating fastener includes a base member, a limiter block fastened to one end of the base member and defining an elliptical constraint hole, a locking rod inserted through the non-circular constraint hole of the limiter block and having an annular groove extending around the periphery of the non-circular rod body thereof, a spring member sleeved onto the locking rod and stopped between a stop flange of the locking rod and the limiter block, and a knob fastened to one end of the locking rod and disposed outside the base member and operable to move the locking rod axially relative to the base member and to rotate the locking rod, when the locking rod is moved to the elevation where the annular groove of the locking rod is kept in the non-circular constraint hole of the limiter block, between a constrained position where the locking rod is stopped by the limiter block from axial movement relative to the base member and a released position where the locking rod is released from the constraint of the limiter blo

Abstract: A captive screw formed of a lock screw, a cap-shaped knob, a spring member and a mounting barrel and mountable in a mounting through hole of a first panel frame and fastenable to a mounting screw hole of a second panel frame to detachably secure the second panel frame to the first panel frame is disclosed. The lock screw has a top protrusion raised from the top wall of the head thereof and a tool groove formed in the top protrusion. The cap-shaped knob is molded on the head of the lock screw by insert molding and defining an endless isolation groove on the top wall of the head of the lock screw around the periphery of the top protrusion that facilitates attachment of a hand tool to the top protrusion of the lock screw for enabling the lock screw to be driven by the user with the hand tool into the mounting screw hole of the second panel frame conveniently with less effort.

Abstract: A quick-positioning captive screw includes a mounting base member having an outer thread spirally extending around the peripheral wall of a top flange thereof, the outer thread having a leading end terminating in the top edge of the top flange and a tail end terminating in the bottom edge of the top flange and cutting a part of the top flange into a rib, a lock screw having an inner thread located on the inside wall of a plastic cap thereof for threading through the outer thread into the space around the periphery of the mounting base member below the bottom edge of the top flange after bonding of the mounting base member to an external panel frame by reflow soldering, and a spring member sleeved onto the threaded shank of the screw bolt of the lock screw and stopped between the head of the screw bolt and the inside step of the mounting base member.

Abstract: A floating fastener includes a connection member fastened to a first plate member with a lock screw member, a retaining member installed in a second plate member, a rotary locking device coupled to the connection member and having a locking shank and a shank head with longitudinal cut planes and insertable through the retaining member, a spring member supported between the top wall of the connection member and a step around the periphery of the locking shank, a knob affixed to the top end of the locking shank and operable to bias the locking shank between a locking position where the shank head is forced into engagement with the retaining member and an unlocking position where the shank head is disengaged from the retaining member, and an elastic cushion ring supported between the connection member and the knob.

Abstract: A fastener includes a body member having a head affixed to a plate member and a shank extended from the head, a spring member mounted in a blind hole of the body member, and a rolling member supported on the spring member in the blind hole and partially forced out of the blind hole by the spring member for stopping at a bottom side of a frame member around a mounting through hole to lock the plate member to the frame member.

Abstract: A floating captive screw includes a mounting socket having a top orifice, an upper flange extending around the periphery and a bottom mounting portion for bonding to a first metal plate member, a locking screw bolt inserted through the mounting socket for fastening to a second metal plate member to lock the first metal plate member to the second metal plate member and having a shoulder for engaging into the top orifice to temporarily lock the locking screw bolt to the mounting socket, a spring member stopped between the head of the locking screw bolt and the upper flange of the mounting socket to impart an upward pressure to the locking screw bolt, and a cap member affixed to the head of the locking screw bolt and axially slidably coupled to the periphery of the mounting socket and stoppable at the bottom side of the upper flange of the mounting socket.

Abstract: A floating fastener includes a mounting socket bonded to a first plate member, a locking member axially movably mounted in the mounting socket and fastenable to a second plate member to lock the first plate member to the second plate member, a first locating ring mounted in the mounting socket around a plain stem of the locking member and adapted for securing a shoulder of the locking member to hold the locking member in a received position temporarily, a spring member mounted around the locking member in the mounting socket and stopped between a head of the locking member and the first locating ring to support the locking member in a floating position, and a second locating ring mounted in the mounting socket to prohibit the locking member from falling out of the mounting socket.

Abstract: A floating fastener includes a mounting socket defining therein an annular locating groove, a locking member having a head, a shank and a retaining portion located on the periphery of the shank, a spring member sleeved onto the shank of the locking member and stopped between the head of the locking member and a shoulder in the mounting socket, a cap member affixed to the head of the locking member and axially slidable coupled to the mounting socket, and a locating ring mounted in the annular locating groove of the mounting socket for engagement with the retaining portion of the locking member to prohibit the locking member from floating when bonding the mounting socket to a predetermined metal plate member.

Abstract: A floating fastener includes a mounting socket bonded to a first plate member and having a beveled top mounting flange, a cap member axially slidably coupled to the mounting socket, an expandable stop ring mounted in a locating groove in the bottom side of the cap member to facilitate coupling of the cap member to the mounting socket and to prohibit the cap member from moving upwardly over the top mounting flange of the mounting socket, a locking member affixed to the cap member for fastening to a second plate member to lock the first and second plate members together, and a spring member sleeved onto the locking member and stopped between the head of the locking member and a shoulder in the mounting socket.

Abstract: A floating fastener includes a base member, a limiter block fastened to one end of the base member and defining an elliptical constraint hole, a locking rod inserted through the non-circular constraint hole of the limiter block and having an annular groove extending around the periphery of the non-circular rod body thereof, a spring member sleeved onto the locking rod and stopped between a stop flange of the locking rod and the limiter block, and a knob fastened to one end of the locking rod and disposed outside the base member and operable to move the locking rod axially relative to the base member and to rotate the locking rod, when the locking rod is moved to the elevation where the annular groove of the locking rod is kept in the non-circular constraint hole of the limiter block, between a constrained position where the locking rod is stopped by the limiter block from axial movement relative to the base member and a released position where the locking rod is released from the constraint of the limiter blo

Abstract: A floating fastener includes a mounting socket, which has a center hole on a flexible transverse wall at one end thereof and mounting ring with a bonding surface for bonding to a plate member, a locking member, which has a fastening end piece forced through the center hole of the mounting socket and stoppable at one side of the flexible transverse wall, a head, a plain stem extending through the center hole and connected between the head and the fastening end piece and a shoulder connected between the head and the plain stem and engageable with a relatively thicker center area of the transverse wall around the center hole, and a spring member sleeved onto the locking member and stopped between the head of the locking member and the mounting ring of the mounting socket.

Abstract: A fastening structure includes a thin, light weight, low torque metal plate member having a mounting through hole, and a fastening member, which has a shank body, a mounting flange extending around the periphery of the bottom end of the shank body and riveted to the mounting through hole and a screw hole on the shank body for the fastening of an external screw member to secure an external circuit board to the top end of the shank body at a distance from the plate member. The mounting flange has a tapered peripheral wall reducing gradually upwardly from the bottom end of the shank body toward the top end thereof and riveted to a mounting through hole of the plate member and a step located on the topmost edge of the tapered peripheral wall around the periphery of the shank body and kept in flush with the top wall of the plate member.

Abstract: A quick-positioning captive screw includes a mounting base member having an outer thread spirally extending around the peripheral wall of a top flange thereof, the outer thread having a leading end terminating in the top edge of the top flange and a tail end terminating in the bottom edge of the top flange and cutting a part of the top flange into a rib, a lock screw having an inner thread located on the inside wall of a plastic cap thereof for threading through the outer thread into the space around the periphery of the mounting base member below the bottom edge of the top flange after bonding of the mounting base member to an external panel frame by reflow soldering, and a spring member sleeved onto the threaded shank of the screw bolt of the lock screw and stopped between the head of the screw bolt and the inside step of the mounting base member.

Abstract: A captive fastener includes a mounting base member bonded to a first panel frame, a locking shank loaded with a spring member and axially movably mounted in the mounting base member hole for engaging into a mounting through hole of a second panel frame to detachably lock the second panel frame to the first panel frame, and a driving member, which is coated with a color index coating for identification and connected to the locking shank after bonding the mounting base member to the first panel frame and operable to move the locking shank between a locking position where the first panel frame and the second panel frame are locked and an unlocking position where the first panel frame is detachable from the second panel frame.

Abstract: A captive screw formed of a lock screw, a cap-shaped knob, a spring member and a mounting barrel and mountable in a mounting through hole of a first panel frame and fastenable to a mounting screw hole of a second panel frame to detachably secure the second panel frame to the first panel frame is disclosed. The lock screw has a top protrusion raised from the top wall of the head thereof and a tool groove formed in the top protrusion. The cap-shaped knob is molded on the head of the lock screw by insert molding and defining an endless isolation groove on the top wall of the head of the lock screw around the periphery of the top protrusion that facilitates attachment of a hand tool to the top protrusion of the lock screw for enabling the lock screw to be driven by the user with the hand tool into the mounting screw hole of the second panel frame conveniently with less effort.

Abstract: A captive screw fabrication mold for molding a plastic or rubber knob on the head of a lock screw for captive screw is disclosed to include a bottom die having a tubular post vertically disposed in each bottom die cavity thereof for holding a lock screw for molding, and an upper die that has an annular rib vertically downwardly suspending in each upper die cavity thereof for stopping against the head of the lock screw in the associating bottom die cavity around the top protrusion of the lock screw to isolate the molding chamber in each upper die cavity, avoiding overflow of the applied molten material into the tool groove in the top protrusion of each lock screw.