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US3737985A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of producing thin layers on a support

Assignee: Motorola Solutions Inc
•
Filing: 1970-10-16
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Granted: 1973-06-12
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Expires: 1990-10-16
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Abstract

Abstract While it is possible to diffuse P impurities into compounds of gallium and arsenic that are useful in producing light emitting PN junctions, at the present state of the art it is not possible to diffuse N type impurities thereinto whereby at the present state of the art thin layers of N type material of gallium and arsenic compounds cannot readily be obtained. The light produced by the PN junction in a light emitting diode is much more greatly absorbed by the P layer than by the N layer, whereby it is advantageous to produce a very thin N type layer in the production of the light emitting PN junctions. A method is disclosed for providing a very thin layer of N type material, the material being a compound of gallium and arsenic that may or may not include other elements that is useful in light emitting diodes.

Inventors

  • 👤 D Zoroglu
  • 👤 W George

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 17:24
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; Y; Y10; Y10S; Y10S148/00; Y10S148/02; Y10S148/036

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 15 words
The method as recited in claim 1 wherein said semiconductor material is a gallium arsenide.
Claim 2
Dependent Claim 21 words
The method as recited in claim 1 wherein the thickness of said N-type region is reduced to less than one mil.

References Cited (Backward Citations)

US3330991A Cited
US3349476A Cited
US3518418A Cited
US3501679A Cited
US3590479A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-06-11 1976-12-11 1977-06-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-06-11 1980-12-11 1981-06-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-06-11 1984-12-11 1985-06-12 $7700.00 Window Closed / Lapsed

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