Communication device

Details Communication device Communication device

2005-08-02

2005-08-02

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular temperature control

Heat sink

C372S046012

Reexamination Certificate

active

06925100

ABSTRACT:
In an LED, the area of contact between an ohmic electrode formed on a contact layer and the contact layer serves as an effective light-emitting area of a light-emitting layer. Therefore, while the area of contact between the ohmic electrode and the contact layer is kept small, a seat electrode is interposed so that the seat electrode is connected to a circuit wiring on a wiring board by a ball electrode being contact with the seat electrode at an area larger than the area. As a result, the size necessary for forming the ball electrode can be secured easily and the light-emitting area of the light-emitting layer in the LED can be reduced sufficiently. Accordingly, a capacitance component formed by clamping the light-emitting portion of the light-emitting layer can be reduced, so that a time constant at a leading edge of luminance and a time constant at a trailing edge of luminance can be reduced sufficiently to obtain a high speed.

REFERENCES:
patent: 5798536 (1998-08-01), Tsutsui
patent: 6023076 (2000-02-01), Shibata
patent: 6404792 (2002-06-01), Yamamoto et al.
patent: 6680490 (2004-01-01), Yasukawa et al.
patent: 6761303 (2004-07-01), Ozawa
patent: 4-242985 (1992-08-01), None
patent: 11-177175 (1999-07-01), None

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