← Back to Patent Explorer
UST954008I4 Expired / Lapsed US ⏱️ 0.0 years remaining

Narrow channel field effect transistor

Assignee: International Business Machines Corp
•
Filing: 1976-01-07
•
Granted: 1977-01-04
•
Expires: 1996-01-07
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract a field effect transistor having a channel width of such small dimension that threshold voltage becomes inversely related to channel width allowing the fabrication of field effect transistors of differing threshold voltages while using the same process steps. Reduced threshold voltage due to prior art "short channel length" effect may be offset by the presently disclosed narrow channel width effect. Desired chanel impedance values are achieved independently of threshold voltage influence due to narrow channel width effect by the provision of parallel-connected field effect transistors of the same channel length whose total channel widths yield a desired net width-to-length ratio.

Inventors

  • 👤 Utz G. Baitinger
  • 👤 Otto G. Folberth
  • 👤 Werner O. Haug
  • 👤 Karl E. Kroell

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 13:45
CPC Classifications
H; H10; H10D; H10D30/00; H10D30/60; H10D64/00; H10D64/20; H10D64/27; H10D64/311; H10D64/411; H10D64/511; H10D64/514; H10D64/516; H10D99/00

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-01-04 1980-07-05 1981-01-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-01-04 1984-07-05 1985-01-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-01-04 1988-07-05 1989-01-04 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag