Patent US5188987A successfully refreshed from Google Patents.
← Back to Patent Explorer
US5188987A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of manufacturing a semiconductor device using a polishing step prior to a selective vapor growth step

Assignee: Toshiba Corp
•
Filing: 1991-06-12
•
Granted: 1993-02-23
•
Expires: 2011-06-12
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A method of manufacturing a semiconductor device comprises the steps of performimg selective vapor growth on a semiconductor substrate, and polishing a surface of an insulative film formed on said semiconductor substrate subsequent to the selective vapor growth step.

Inventors

  • 👤 Masanobu Ogino

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 23:33
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D62/13; H10D62/149; H10D62/151; H10D64/00; H10D64/01; H10D64/011; H10D64/0111; H10D64/0113; H10D64/20; H10D64/23; H10D64/251; H10D64/258; H10W; H10W20/00; H10W20/01; H10W20/031; H10W20/056; H10W20/057; H10W20/071; H10W20/40; H10W20/41; H10W20/44; H10W20/4451; Y; Y10; Y10S; Y10S148/00; Y10S148/017

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 105 words
A method of manufacturing a semiconductor device, comprising the steps of: forming an insulative film on a semiconductor substrate of said device; forming a hole in said insulative film; performing selective vapor growth to form a conductive layer in said hole on said semiconductor substrate; and removing silicon particles from said semiconductor substrate by polishing a substantially entire surface of said insulating film formed on said semiconductor substrate subsequent to the selective vapor growth to produce a reduction in thickness of the insulating film of 0.05 micron maximum, the polishing being performed by using cloths containing an alkaline solution having silicon oxides particles dissolved therein.
Claim 2
Independent Claim 105 words
A method of manufacturing a semiconductor device, comprising the steps of: forming an insulative film on a semiconductor substrate of said device; forming a hole in said insulative film; performing selective vapor growth to form a conductive layer in said hole on said semiconductor substrate; and removing silicon particles from said semiconductor substrate by polishing a substantially entire surface of said insulating film formed on said semiconductor substrate subsequent to the selective vapor growth to produce a reduction in thickness of the insulating film of 0.05 micron maximum, the polishing being performed by using cloths containing an alkaline solution having silicon oxides particles dissolved therein.
Claim 3
Dependent Claim 22 words
A method according to claim 1, further comprising the step of forming a BPSG (boron-phosphorus-silicon glass) film adjacent to said insulating film.
Claim 4
Dependent Claim 30 words
A method according to claim 1, wherein said selective vapor growth step is performed on a semiconductor device including the semiconductor substrate, diffusion regions, the insulative film, and an electrode.
Claim 5
Dependent Claim 29 words
A method according to claim 3, wherein said selective vapor growth step includes a step of forming openings in said insulative film so as to reach the diffusion regions.
Claim 6
Dependent Claim 22 words
A method according to claim 1, wherein said selective vapor growth step is performed with use of SiH 2 Cl 2 gas.
Claim 7
Dependent Claim 19 words
A method according to claim 1, wherein said selective vapor growth step is performed with use of HCl gas.
Claim 8
Dependent Claim 20 words
A method according to claim 1, wherein said selective vapor growth step is performed with use of PH 3 gas.
Claim 9
Dependent Claim 14 words
A method according to claim 1, wherein said alkaline solution is NH 4 OH.
Claim 10
Independent Claim 114 words
A method of manufacturing a semiconductor device, comprising the steps of: forming an insulative film on a semiconductor substrate of said device; forming a hole in said insulative film; performing selective vapor growth to form a conductive layer in said hole on said semiconductor substrate; removing silicon particles from said semiconductor substrate by polishing a substantially entire surface of said insulating film formed on said semiconductor substrate subsequent to the selective vapor growth to produce a reduction in thickness of the insulating film of 0.05 micron maximum, the polishing being performed by using cloths containing an alkaline solution having silicon oxide particles dissolved therein; and rinsing said semiconductor substrate subsequent to said polishing step.
Claim 11
Independent Claim 114 words
A method of manufacturing a semiconductor device, comprising the steps of: forming an insulative film on a semiconductor substrate of said device; forming a hole in said insulative film; performing selective vapor growth to form a conductive layer in said hole on said semiconductor substrate; removing silicon particles from said semiconductor substrate by polishing a substantially entire surface of said insulating film formed on said semiconductor substrate subsequent to the selective vapor growth to produce a reduction in thickness of the insulating film of 0.05 micron maximum, the polishing being performed by using cloths containing an alkaline solution having silicon oxide particles dissolved therein; and rinsing said semiconductor substrate subsequent to said polishing step.
Claim 12
Dependent Claim 15 words
The method according to claim 9, wherein said rinsing step is an ultrasonic rinsing step.
Claim 13
Dependent Claim 17 words
The method according to claim 9, wherein said rinsing step is performed with use of pure water.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1996-02-23 1996-08-24 1997-02-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-02-23 2000-08-24 2001-02-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-02-23 2004-08-24 2005-02-23 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag