Abstract:
PROBLEM TO BE SOLVED: To provide a method of forming a transistor body contact in an SOI device. SOLUTION: An SOI substrate contact is provided on the bodies of transistors fabricated in an SOI silicon wafer by selectively making an insulating layer below the bodies leaky. This is achieved by implanting, below a set of transistor body locations, a predetermined dose of ions having an energy such that the implanted region extends vertically through a buried insulator between the body and the wafer substrate. Thereafter, a sufficient voltage is applied to break down an oxide, and a conductive path is made between the body and the substrate.
Abstract:
A fuse for semiconductor devices, in accordance with the present invention, includes a cathode (104) including a first dopant type, and an anode (102) including a second dopant type where the second dopant type is opposite the first dopant type. A fuse link (106) connects the cathode and the anode and includes the second dopant type. The fuse link and the cathode form a junction (111) therebetween, and the junction is configured to be reverse biased relative to a cathode potential and an anode potential. A conductive layer (103) is formed across the junction such that current flowing at the junction is diverted into the conductive layer to enhance material migration to program the fuse.
Abstract:
A patterned buried insulator is formed beneath the source and drain by forming a mask over the body area and implanting a dose of n or p type ions in the areas where the source and drains will be formed, then etching the STI and etching out the implanted area. A light oxidation is followed by a conformal oxide deposition in the STI and also in the etched area, thereby forming the buried oxide only where desired.