USPatentGranted
B2

Semiconductor display device

Granted 17 Aug 2004 · 2 office actions

Current assignee: Semiconductor Energy Laboratory Co., Ltd. · originally Semiconductor Energy Laboratory

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Inventors: Yasuhiko Takemura, Akira Mase, Hideki Uochi, Masaaki Hiroki +3 · Examiner: Allan R. Wilson

Life of the patent

9 dated events
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Abstract

An insulated-gate field-effect transistor adapted to be used in an active-matrix liquid-crystal display. The channel length, or the distance between the source region and the drain region, is made larger than the length of the gate electrode taken in the longitudinal direction of the channel. Offset regions are formed in the channel region on the sides of the source and drain regions. No or very weak electric field is applied to these offset regions from the gate electrode.

Classifications

5 codes
IPC · International Patent Classification
Section H — Electricity
  • H01L3/1039
USPC · US Patent Classification
257/59257/408257/344257/72

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File wrapper

⤢ drag to zoomApr 2003Jul 2003Oct 2003Jan 2004Apr 2004Jul 2004Oct 2004USPTOApplicantNon-final rejectionResponse after non-finalNotice of allowanceRequest for continued examination
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Pendency
1.4 y
518 days filing → grant
Office actions
1
non-final + final
Responses
2
1 RCE
Examiner
Allan R. Wilson
art unit —
Citations: 251 back · 0 forward

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Priority chain

1 priority documents
›Priority documents — 1
TypeDocumentDate
related publicationUS 20030173570 A118 Sep 2003

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