Samsung Electronics Co., Ltd.

Hyundai Motor Company

Kia Motors Corporation

Sungkyunkwan University

Samsung Life Welfare Foundation

Dae-Jong Kim

Ho-Jeong Choi

Jong-Sang Park

In-Su Baek

Chengzhe Bai

Seong-Cheol Jeong

Chan-Soon Park

Hye-Yeong Nam

A fuel cell failure diagnostic apparatus is provided. The apparatus includes a water-level sensor that senses a water-level of water generated at an anode side of a fuel cell stack and stored in a water trap and a drain valve for the drain control of the generated water. A drain valve position sensor senses a position of the drain valve. A controller detects a failure situation by performing failure diagnosis based on the sensing information generated from the water-level sensor and the drain valve position sensor, and performs a corresponding control depending upon the failure situation.

Fuel cell failure diagnostic apparatus and method thereof

A method of and testing jig for sequentially testing front and rear surfaces of a semiconductor chip is shown. The testing jig includes a support package having a first cavity over which the semiconductor chip mounts; an infrared filter affixed relative to the first cavity and attached to a rear surface of the semiconductor chip; and a test substrate having a second cavity exposing the infrared filter and upon which the support package mounts. Front and rear surfaces of the semiconductor chip can be conveniently and sequentially tested. Because the testing jig includes the infrared filter and the heat pad, heat can be easily transmitted to the defective chip.

Method of testing a semiconductor chip and jig used in the method

Growing community of inventors

Gyeonggi-do, South Korea

Dae-Jong Kim