Semiconductor device and liquid crystal panel driver device

Details Semiconductor device and liquid crystal panel driver device Semiconductor device and liquid crystal panel driver device

2006-07-17

2009-08-25

Shalwala, Bipin (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S104000, C345S204000, C345S205000, C324S763010, C324S765010, C324S701000

Reexamination Certificate

active

07580020

ABSTRACT:
A semiconductor device carries out a test utilizing contact with a probe needle without being affected by narrowing of the pitch at which output pads are arranged. The device is equipped with test circuits provided between a plurality of output buffers via which signals are output and output pads corresponding thereto. The test circuit includes output switches caused to sequentially make connections by a controller in test and interpad switches involved in making connections of the output pads with a test pad by the controller in test. In test, probe needles are brought into contact with the test pad. The output pads are not used in test, and can be arranged at a narrowed pitch. Thus, the chip area can be reduced and are therefore so that the pitch for the output pads can be narrowed and the chip area can be decreased.

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