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US5107315A Expired / Lapsed US ⏱️ 0.0 years remaining

Mis type diamond field-effect transistor with a diamond insulator undercoat

Assignee: Kobe Steel Ltd
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Filing: 1991-03-12
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Granted: 1992-04-21
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Expires: 2011-03-12
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Abstract

Abstract Disclosed herein is a MIS type diamond field-effect transistor comprising a diamond semiconductor layer provided as an active layer by chemical vapor deposition (CVD), and a diamond insulator layer provided on the diamond semiconductor layer also by CVD, a gate electrode being formed on the diamond insulator layer, wherein a diamond insulator undercoat is provided on a non-diamond substrate by CVD, and the diamond semiconductor layer and the diamond insulator layer are sequentially provided on the diamond insulator undercoat. The MIS type diamond field-effect transistor with this structure ensures that in the manufacture thereof, a diamond insulator undercoat of large area can be formed on a non-diamond substrate of CVD, whereby a large number of elemental devices can be fabricated simultaneously.

Inventors

  • 👤 Kazuo Kumagai
  • 👤 Koichi Miyata
  • 👤 Shigeaki Miyauchi
  • 👤 Yuichi Matsui
  • 👤 Koji Kobashi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 03:56
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/83; H10D62/8303; H10D30/00; H10D30/01; H10D30/021; H10D30/031; H10D30/0312; H10D30/0314; H10D30/60; H10D30/67; H10D30/674; H10D30/6741

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 76 words
A MIS type diamond field-effect transistor comprising a diamond semiconductor layer provided as an operating layer by chemical vapor deposition (CVD), and a diamond insulator layer provided on the diamond semiconductor layer also by CVD, a gate electrode being formed on the diamond insulator layer, wherein a diamond insulator undercoat is provided on a non-diamond substrate by CVD, and the diamond semiconductor layer and the diamond insulator layer are sequentially provided on the diamond insulator undercoat.
Claim 2
Dependent Claim 76 words
A MIS type diamond field-effect transistor comprising a diamond semiconductor layer provided as an operating layer by chemical vapor deposition (CVD), and a diamond insulator layer provided on the diamond semiconductor layer also by CVD, a gate electrode being formed on the diamond insulator layer, wherein a diamond insulator undercoat is provided on a non-diamond substrate by CVD, and the diamond semiconductor layer and the diamond insulator layer are sequentially provided on the diamond insulator undercoat.

References Cited (Backward Citations)

JPS58141572A Cited
JPS5963732A Cited
US4863529A Cited
JPS63288991A Cited
US4929986A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-04-21 1995-10-21 1996-04-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-04-21 1999-10-21 2000-04-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-04-21 2003-10-21 2004-04-21 $7700.00 Window Closed / Lapsed

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