GB1345219A - Method of manufacturing wires having a surface layer which consists of boron - Google Patents
Method of manufacturing wires having a surface layer which consists of boronInfo
- Publication number
- GB1345219A GB1345219A GB4825271A GB4825271A GB1345219A GB 1345219 A GB1345219 A GB 1345219A GB 4825271 A GB4825271 A GB 4825271A GB 4825271 A GB4825271 A GB 4825271A GB 1345219 A GB1345219 A GB 1345219A
- Authority
- GB
- United Kingdom
- Prior art keywords
- boron
- per cent
- etching
- surface layer
- oct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/53—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone involving the removal of at least part of the materials of the treated article, e.g. etching, drying of hardened concrete
- C04B41/5338—Etching
- C04B41/5353—Wet etching, e.g. with etchants dissolved in organic solvents
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
- Weting (AREA)
Abstract
1345219 Etching PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 18 Oct 1971 [21 Oct 1970] 48252/71 Heading B6J [Also in Division C7] A boron-surfaced wire is produced by depositing boron on to a hot support from a gaseous mixture comprising a volatile boron compound, and subsequently etching off part of the thickness of the boron layer with an etchant consisting of 55 to 85 wt. per cent H 3 PO 4 , 2 to 20 wt. per cent HNO 3 , and 10 to 35 per cent water. The etching temperature may be 100‹ C. Typically, a W wire is coated in BCl 3 /H 2 in a volume ratio of 1 : 3 at 1100‹ C., and etched as described above.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7015375A NL7015375A (en) | 1970-10-21 | 1970-10-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1345219A true GB1345219A (en) | 1974-01-30 |
Family
ID=19811339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4825271A Expired GB1345219A (en) | 1970-10-21 | 1971-10-18 | Method of manufacturing wires having a surface layer which consists of boron |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3785891A (en) |
| JP (1) | JPS5129504B1 (en) |
| CA (1) | CA939596A (en) |
| FR (1) | FR2111549A5 (en) |
| GB (1) | GB1345219A (en) |
| NL (1) | NL7015375A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319069A (en) * | 1980-07-25 | 1982-03-09 | Eastman Kodak Company | Semiconductor devices having improved low-resistance contacts to p-type CdTe, and method of preparation |
| US5336360A (en) * | 1986-08-18 | 1994-08-09 | Clemson University | Laser assisted fiber growth |
| US5399430A (en) * | 1986-08-18 | 1995-03-21 | Clemson University | Boron fibers having improved tensile strength |
| JP2664866B2 (en) * | 1993-04-09 | 1997-10-22 | インターナショナル・ビジネス・マシーンズ・コーポレイション | Method for etching boron nitride |
-
1970
- 1970-10-21 NL NL7015375A patent/NL7015375A/xx unknown
-
1971
- 1971-10-04 CA CA124,281A patent/CA939596A/en not_active Expired
- 1971-10-18 JP JP46081753A patent/JPS5129504B1/ja active Pending
- 1971-10-18 GB GB4825271A patent/GB1345219A/en not_active Expired
- 1971-10-18 US US00190378A patent/US3785891A/en not_active Expired - Lifetime
- 1971-10-19 FR FR7137517A patent/FR2111549A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA939596A (en) | 1974-01-08 |
| NL7015375A (en) | 1972-04-25 |
| DE2149359A1 (en) | 1972-04-27 |
| US3785891A (en) | 1974-01-15 |
| FR2111549A5 (en) | 1972-06-02 |
| JPS5129504B1 (en) | 1976-08-26 |
| DE2149359B2 (en) | 1976-02-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |