Patent ID: 6245992
Filing Date: 2001-06-12
Classification: G06F,G06K,G08B,H01L,H05K

Abstract:
A security box for protecting an integrated circuit chip mounted on a circuit board, said security box comprising a top metal cover member and a bottom metal cover member respectively attached to top and bottom faces of the circuit board for enclosing the integrated circuit chip and blocking radio frequency emission from the integrated circuit chip, and means for forming an electrical loop between the circuit board and at least one of the cover members when the box is mounted to the circuit board whereby when the box is opened, the electrical loop is broken and a protection process is initiated to prevent unauthorized copy of program codes written in the integrated circuit chip, wherein the means for forming an electrical loop comprises a first conductive member protruded from the circuit board and a second conductive member protruded from said at least one of the cover members, and the two conductive members engaging with each other when said at least one of the cover members is mounted to the circuit board thereby forming the electrical loop.