← Back to Patent Explorer
US3575732A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of fabricating small-area semiconductor devices

Assignee: MA Com Inc
•
Filing: 1969-06-06
•
Granted: 1971-04-20
•
Expires: 1989-06-06
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract THIS INVENTION RELATES TO A METHOD OF MANUFACTURING EXTREMELY SMALL AREA SEMICONDUCTOR DEVICES BY FIRST PRODUCING VERY SMALL APERTURES BY MEANS OF ENERGETIC PARTICLES IN NON-CONDUCTIVE PASSIVATING LAYERS PLACED ON SEMICONDUCTORS, AND THE SUBSEQUENT USE OF THESE APERTURES TO FABRICATE SEMICONDUCTOR DEVICES OF EXCEPTIONALLY GOOD HIGH-FREQUENCY PERFORMANCE. THE TECHNIQUE IS BASED UPON THE DAMAGE TRACKS PRODUCED IN INSULATING SOLIDS USED TO PASSIVATE SEMICONDUCTORS BY EXPOSING THEM TO ENERGETIC PARTICLES SUCH AS, FOR EXAMPLE, ALPHA PARTICLES ABOVE A THRESHOLD VALUE, AND SUBSEQUENTLY ETCHING AWAY THE DAMAGED REGION TO LEAVE VERY SMALL APERTURES IN THE INSULATING SOLID. SEMICONDUCTOR PLATING AN FABRICATING TECHNIQUES ARE SUBSEQUENTLY USED TO PRODUCE A VARIETY OF SEMICONDUCTORS AND IN PARTICULAR SEMICONDUCTORS OF THE SCHOTTKY DIODE TYPE.

Inventors

  • 👤 Arthur Uhlir Jr

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 05:32
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/40; H10D; H10D99/00; H10P; H10P14/00; H10P14/40; H10P14/46; H10P95/00; H10W74/00; H10W74/01; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S148/00; Y10S148/023

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) 1974-04-19 1974-10-19 1975-04-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-04-19 1978-10-19 1979-04-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-04-19 1982-10-19 1983-04-20 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag