公开(公告)号：US4933898A

公开(公告)日：1990-06-12

申请号：US297472

申请日：1989-01-12

申请人： Robert C. Gilberg ,  Richard M. Knowles ,  Paul Moroney ,  William A. Shumate

发明人： Robert C. Gilberg ,  Richard M. Knowles ,  Paul Moroney ,  William A. Shumate

IPC分类号： H01L21/8247 ,  G06F1/00 ,  G06F12/14 ,  G06F21/00 ,  G06F21/02 ,  G11C7/24 ,  H01L21/82 ,  H01L21/822 ,  H01L23/58 ,  H01L27/02 ,  H01L27/04 ,  H01L29/788 ,  H01L29/792

CPC分类号： H01L23/576 ,  G06F21/86 ,  G11C7/24 ,  H01L27/02 ,  H01L2924/0002 ,  Y10S257/922

摘要： An integrated circuit chip containing a secure area in which secure data is processed and/or stored, includes a semiconductive layer containing diffusions defining circuit element components; a first conductive layer coupled to the semiconductive layer to interconnect the components to thereby define circuit elements for distributing, storing processing and/or affecting the processing of secure data; and a second conductive layer overlying the circuit elements to thereby define a secure area in which the circuit elements are shielded from inspection, and coupled to the circuit elements for conducting to the circuit elements a predetermined signal that is essential to an intended function of the shielded circuit elements, whereby removal of the second conductive layer will prevent the predetermined essential signal from being provided to the circuit elements and thereby prevent the intended function.