Abstract:
A micro-electromechanical switch (MEMS) having a deformable elastomeric element (1) which exhibits a large change in conductivity with a small amount of displacement. The deformable elastomeric element (1) is displaced by an electrostatic force that is applied laterally resulting in a small transverse displacement. The transversal displacement, in turn, pushes a metallic contact (7) against two conductive paths (5, 6), allowing passage of electrical signals. The elastomer (1) is provided on two opposing sids with embedded metallic elements (9, 10), such as impregnated metallic rods, metallic sheets, metallic particles, or conductive paste. Actuation electrodes (18, 8) are placed parallel to the conductive sides of the elastomer. A voltage applied between the conductive side of the elastomer and the respective actuation electrodes (18, 8) generate the electrostatic attractive force that compresses the elastomer (1), creating the transverse displacement that closes the MEMS. The elastomeric based MEMS extends the lifetime of the switch by extending fatigue life of the deformable switch elements.
Abstract:
PROBLEM TO BE SOLVED: To provide a method to form a high performance hetero-junction bipolar transistor. SOLUTION: The invention includes a process to form two pairs of spacers at both ends of an emitter pedestal. After a first pair of spacers 130 is formed, a first outer base region 100 is formed at both ends of an intrinsic base. A second pair of spacers 160 is formed above the first pair of spacers 130. Then, a second outer base region 140 is formed at both ends of the intrinsic base. Two pairs of spacers enable the first outer base and the second outer base to have different widths. This brings about a structure of complex outer base that is adjacent to an emitter 22 and not adjacent to a collector 20 and consequently a base parasitic resistance reduces with the reduction of parasitic capacitance between the collector and outer base.
Abstract:
Multilevel metallization layouts for an integrated circuit chip (30) including transistors having first (31 ), second (32) and third (33) elements to which metallization layouts connect. The layouts minimize current limiting mechanism including electromigration by positioning the connection (39) for the second contact vertically (32) from the chip (30), overlapping the planes and fingers of the metallization layouts to the first and second elements (31 ) and (32) and forming a pyramid or staircase of multilevel metallization layers (45) and (46) to smooth diagonal current flow.
Abstract:
PROBLEM TO BE SOLVED: To provide a transistor having a minimized parasitic effect. SOLUTION: The transistor includes an emitter, having a recessed extrinsic emitter portion on an intrinsic emitter portion, and an intrinsic base portion electrically contacted with the intrinsic emitter portion and an extrinsic base portion electrically contacted with the intrinsic base portion, and also includes a base electrically isolated from a recessed extrinsic emitter portion by means of a pair of emitter/base spacers and a collector electrically contacted with the intrinsic base portion. The transistor can further include an intrinsic base, having a completely silicide upper surface, until it reaches the emitter/base spacers. The transistor can further include a base window opening in an active region. A method of forming the transistor is also included. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a fine electric mechanical switch having a restoring force large enough to overcome static friction. SOLUTION: This fine electric mechanical switch comprises a conductive beam 10 capable of being warped, and a plurality of electrodes which are covered with elastically deformable conductive layers 11. At first, a restoring force is generated by a single spring constant k0 of the beam 10 by applying a control voltage between the beam 10 capable of being warped and a control electrode 12 which is flush with a switch electrode 13. Then, when the fine electric mechanical switch is approached to the closed state and the conductive layers 11 are compressed, restoring forces due to additional spring constants, k1,..., kn of the plurality of deformable conductive layers 11 are sequentially added to the restoring force due to the spring constant k0 of the beam 10. In another embodiment, deformable spring-like elements are used in place of the deformable layers. Furthermore in the other embodiment, compressible layers or the deformable spring-like elements are mounted on the warping beam which is opposed to the switch electrode. COPYRIGHT: (C)2003,JPO
Abstract:
The invention provides a PIN diode having a laterally extended I-region (5). The invention also provides a method of fabricating the inventive PIN diode compatible with modern RF technologies such as silicon-germanium BiCMOS processes.
Abstract:
The invention provides a PIN diode having a laterally extended I-region (5). The invention also provides a method of fabricating the inventive PIN diode compatible with modern RF technologies such as silicon-germanium BiCMOS processes.
Abstract:
The invention provides a PIN diode having a laterally extended I-region (5). The invention also provides a method of fabricating the inventive PIN diode compatible with modern RF technologies such as silicon-germanium BiCMOS processes.