Convertible multi-function microelectronic logic gate structure

Details Convertible multi-function microelectronic logic gate structure Convertible multi-function microelectronic logic gate structure

1991-04-01

1992-09-08

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307362, 307468, H03K 19094

Patent

active

051461170

ABSTRACT:
A plurality of field effect transistors (FETS) (Q.sub.0 A to Q.sub.n-1 A, and Q.sub.0 B to Q.sub.n-1 B) are arranged in a structure (10) to normally perform a first logic function such as NAND. Selectively implanting the channel region (38) of at least one of the FETs (30) with sufficient ions of a predetermined ion species such that the respective FET (30) maintains a constant logic state (constantly turned ON or OFF) for all logical values of applied gate voltage converts the structure (10) to perform a second logic function such as NOR. Alternatively, one of the logic states may be "stuck high" (constant logical high output) or "stuck low" (constant logical low output). The channel implants are substantially undetectable, rendering the structure (10) highly resistant to reverse engineering.

REFERENCES:
patent: 4084105 (1978-04-01), Teranishi et al.
patent: 4482822 (1984-11-01), Kamuro et al.
patent: 4583011 (1986-04-01), Pechar
patent: 4766516 (1988-08-01), Ozdenir et al.

Affiliated with

Also associated with

Rating

Convertible multi-function microelectronic logic gate structure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Convertible multi-function microelectronic logic gate structure , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Convertible multi-function microelectronic logic gate structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-136208