Patent ID: 8324908

Claim:
An electrical connection defect detection device to detect whether an electrical connection between an under-test pin of an under-test device and a signal line of a circuit board is normal, wherein the electrical connection defect detection device comprises: a signal provider to provide a test signal to the under-test pin through the signal line; a detection module; and an electrode board electrically connected to the detection module, wherein the electrode board comprises: a detection surface to contact a surface of the under-test device and keep a distance from the under-test pin such that the detection module detect a value of a capacitance associated with the electrode board, the under-test pin and the signal line larger than a threshold value when the signal provider provides the test signal to the under-test pin and when the connection of the under-test pin and the signal line is normal; and at least one array of through holes placed along the edges of the electrode board and electrically connected to a ground potential to perform a capacitive shielding when the signal provider and the electrode board are on the same side of the circuit board.