(12) United States Patent ao) Patent No.: Us 7,640,658 Bi
Phametal. (45) Date of Patent: Jan. 5,2010
Page 2
(54) METHODS FOR FORMING AN ANTI-TAMPER PATTERN
(75) Inventors: Cuong V. Pham, San Diego, CA (US);
David E. Chubin, Northridge, CA (US);
Robert A. Clarke, Thousand Oaks, CA
(US); Aaron D. Kuan, Huntington
Beach, CA (US)
(73) Assignee: Teledyne Technologies Incorporated,
Thousand Oaks, CA (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 75 days.
(21) Appl.No.: 11/252,402
(22) Filed: Oct. 18, 2005
(51) Int. CI.
HOSK 3/02 (2006.01)
HOSK 3/10 (2006.01)
(52) U.S. CI 29/846; 29/842; 257/679;
430/541; 713/194
(58) Field of Classification Search 29/592.1,
29/601.1,842,846; 205/125; 257/679,784; 340/541,550,571,652; 361/765,818; 428/68;
713/194
See application file for complete search history.
(56) References Cited
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(Continued) Primary Examiner—Donghai D. Nguyen
