US 11,988,710 B2
Test methods, tester, load board and test system
Chia-Chi Hsu, Hefei (CN)
Assigned to Changxin Memory Technologies, Inc., Hefei (CN)
Filed by Changxin Memory Technologies, Inc., Anhui (CN)
Filed on Feb. 3, 2021, as Appl. No. 17/166,956.
Application 17/166,956 is a continuation of application No. PCT/CN2019/100510, filed on Aug. 14, 2019.
Claims priority of application No. 201811012537.4 (CN), filed on Aug. 31, 2018; and application No. 201821427929.2 (CN), filed on Aug. 31, 2018.
Prior Publication US 2021/0173008 A1, Jun. 10, 2021
Int. Cl. G01R 31/28 (2006.01); G01R 23/02 (2006.01); G01R 31/317 (2006.01); G06F 11/26 (2006.01); G06F 11/267 (2006.01); G06F 11/273 (2006.01)
CPC G01R 31/31713 (2013.01) [G06F 11/267 (2013.01); G06F 11/273 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A test method, comprising:
outputting, through a first input/output (I/O) port of a tester, a first test signal to a first channel of a load board, wherein the first test signal is used to generate a second test signal and a third test signal;
receiving, through the first I/O port, a third feedback signal returned from the first channel, wherein the third feedback signal is generated based on a first feedback signal and a second feedback signal, the first feedback signal is generated by a first data source in response to the second test signal, and the second feedback signal is generated by a second data source in response to the third test signal; and
determining whether the first data source and the second data source are operating normally based on the third feedback signal,
wherein the determining whether the first data source and the second data source are operating normally based on the third feedback signal comprises:
if the third feedback signal is lower than a first threshold or higher than a second threshold, determining that the first data source and the second data source are operating normally; and
if the third feedback signal is higher than or equal to the first threshold and lower than or equal to the second threshold, determining that the first data source or the second data source is operating abnormally.