초록 ▼

A tamper protected printed circuit board assembly including a printed circuit board and a partially enveloping tamper wrap covering the entirety of the top surface of the printed circuit board and a first portion of the bottom surface of the printed circuit board, wherein a second portion of the bot

A tamper protected printed circuit board assembly including a printed circuit board and a partially enveloping tamper wrap covering the entirety of the top surface of the printed circuit board and a first portion of the bottom surface of the printed circuit board, wherein a second portion of the bottom surface of the printed circuit board is not covered by the tamper wrap is provided. The printed circuit board includes two security trace layers each having two security traces thereon, preferably in a serpentine pattern. The tamper wrap and the security traces together cover and prevent tampering with the electronic circuitry of the printed circuit board.

대표청구항 ▼

What is claimed is: 1. A method of manufacturing a printed circuit assembly having tamper detection circuits, said printed circuit board having a first security trace layer having first and second traces thereon, a second security trace layer, adjacent to said first security trace layer, having thi

What is claimed is: 1. A method of manufacturing a printed circuit assembly having tamper detection circuits, said printed circuit board having a first security trace layer having first and second traces thereon, a second security trace layer, adjacent to said first security trace layer, having third and fourth traces thereon, said method comprising: mounting circuit components to a top surface of said printed circuit board; covering said top surface of said printed circuit board and a first portion of a bottom surface of said printed circuit board with a flexible wrap having fifth and sixth traces thereon, a second portion of said bottom surface of said printed circuit board not being covered by said flexible wrap, said first and second traces of said first security trace layer and said third and fourth traces of said second security trace layer occupying said second portion of said bottom surface of said printed circuit board; connecting the first, third and fifth traces in series to from a first tamper detection circuit path; connecting said second, fourth and sixth traces in series to form a second tamper detection circuit path; wherein said flexible wrap and said first and second security trace layers provide said tamper detection circuits. 2. The method of claim 1, wherein mounting circuit components further comprises: mounting circuit components to detect whether any one of said first, second, third, fourth, fifth and sixth traces is broken or comes into contact with another one of said first, second, third, fourth, fifth and sixth traces. 3. The method of claim 1, wherein said first, second, third and fourth traces each have a serpentine pattern. 4. The method of claim 3, wherein said first and second traces run adjacent to one another and said third and fourth traces run adjacent to one another. 5. The method of claim 4, wherein said first and second traces are offset from said third and fourth traces such that said first and second traces are aligned in gaps between said third and fourth traces. 6. The method of claim 1, wherein said printed circuit board further includes a ground plane layer adjacent to a top surface of said second security trace layer, said ground plane layer covering said first, second, third and fourth traces. 7. The method of claim 6, wherein said printed circuit board further includes a secondary side layer adjacent to a top surface of said ground plane layer, a top surface of said secondary side layer being said bottom surface of said printed circuit board.