Appeal No. 95-3779 Application No. 08/191,063 which have discernible layouts, which look alike to a reverse engineer, but with dopant implant interconnections that are not discernible by reverse engineering. Representative independent claim 1 is reproduced as follows: 1. A secure integrated circuit (IC), comprising: a semiconductor substrate, at least two logic circuits of different types formed in said substrate with layouts which make said two logic circuits look alike to a reverse engineer, each logic circuit having doped IC elements, and an interconnect for at least one of said elements, said interconnect comprising a dopant implant in said substrate of like conductivity to said element, and providing an electrical signal path to interconnect said element with another portion of the IC, said dopant implant being substantially not discernible by reverse engineering techniques. The examiner relies on the following references: Koeppe 4,799,096 Jan. 17, 1989 Kuwana 5,138,197 Aug. 11, 1992 (filed May 22, 1991) Sawase (JP) 58-190064 Nov. 5, 1983 Claims 1 through 15 and 21 stand rejected under 35 U.S.C. ' 112, first paragraph, under the written description provision of that statutory section as being based on a specification that allegedly fails to provide support for the invention as is now claimed. Claims 1 through 15 and 21 also stand rejected under 35 U.S.C. ' 103 as unpatentable over Kuwana. 2Page: Previous 1 2 3 4 5 6 7 NextLast modified: November 3, 2007