Patent ID: 11933815
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A test fixture, comprising:
a signal test board, wherein the signal test board comprises a first surface, and a second surface opposing the first surface, the first surface has at least one first pin, and at least one test point located around the first pin, and the second surface has at least one second pin;
at least one circuit routing located in the signal test board and configured to connect the at least one first pin and corresponding at least one second pin, wherein a portion of the circuit routing comprises an upper routing connected with one of the at least one first pin, a lower routing connected with one of the at least one second pin, and a via-hole routing connected with two ends of the upper routing and the lower routing, and wherein one end, connected with the via-hole routing, of the upper routing is located in a projection area of a corresponding test point;
a branch routing located in the signal test board and configured to connect the at least one test point with a corresponding upper routing; and
a Printed Circuit Board (PCB) main board and a packaged chip to be tested, the packaged chip to be tested has at least one third pin, and the PCB main board has a functional circuit, and at least one fourth pin connected with the functional circuit, the packaged chip to be tested is located on the first surface of the signal test board, and at least one third pin on the packaged chip to be tested is connected with a corresponding at least one first pin on the signal test board, the PCB main board is located on the second surface of the signal test board, and the at least one fourth pin on the PCB main board is connected with a corresponding at least one second pin on the signal test board.