US2887630A - Transistor - Google Patents
Transistor Download PDFInfo
- Publication number
- US2887630A US2887630A US640212A US64021257A US2887630A US 2887630 A US2887630 A US 2887630A US 640212 A US640212 A US 640212A US 64021257 A US64021257 A US 64021257A US 2887630 A US2887630 A US 2887630A
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- US
- United States
- Prior art keywords
- semi
- conductive
- transistor
- envelope
- electrode
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- Expired - Lifetime
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- 230000003321 amplification Effects 0.000 claims description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 238000005530 etching Methods 0.000 claims description 8
- -1 NITROGENOXYGEN COMPOUND Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 229910052732 germanium Inorganic materials 0.000 description 6
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000956 alloy Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- WFPZPJSADLPSON-UHFFFAOYSA-N dinitrogen tetroxide Inorganic materials [O-][N+](=O)[N+]([O-])=O WFPZPJSADLPSON-UHFFFAOYSA-N 0.000 description 4
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001676573 Minium Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- NVKTUNLPFJHLCG-UHFFFAOYSA-N strontium chromate Chemical compound [Sr+2].[O-][Cr]([O-])(=O)=O NVKTUNLPFJHLCG-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/16—Fillings or auxiliary members in containers or encapsulations, e.g. centering rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/909—Controlled atmosphere
Definitions
- the invention relates to a method of producing a semiconductive electrode system, more particularly a transistor, in which a semi-conductive body .of, for example, germanium or silicon is provided with at least one rectifying electrode and an ohmic connection, this structure being then etched and housed in an envelope.
- the invention furthermore relates to a semi-conductive electrode system, more particularly a transistor, housed in an airtight'envelope.
- the invention has been found to be of particular importance for transistors, for the purpose of increasing the current amplification factor ea which is defined by the equation:
- I and l designate the collector current and the base current respectively, measured at a constant collector voltage V
- the invention has for its object to provide inter alia a method by which a semi-conductive electrode system having a high current amplification factor and great stability can be manufactured. It has furthermore the advantage that, in a simple manner, the surface of the semiconductive body can be coated with very thin, effective layers even of molecular thickness.
- the semi-conductive body with its electrode and ohmic connection is introduced, subsequent to the etching operation, into a milieu containing at least a nitrogen-oxygen compound.
- Use is preferably made of a nitrogen-oxygen compound which contains molecules of N and N 0 the equilibrium shifting in the direction of the first-mentioned compound at higher temperatures.
- water vapour may also be added.
- the invention is not restricted to a particular semi-conductive substance, it is particularly suitable for use with semi-conductive electrode systems, for example, alloy transistors, of which the semi-conductive body consists of silicon, since by the conventional means, which in the case of germanium yielded satisfactory values of the current amplification factor, unsatisfactory results are obtained in the case of silicon.
- a particular embodiment of the invention consists in that the semi-conductive body with its electrode ,and ohmic connection is arranged in a vacuum-tight envelope 2,887,630 Patented May 19, 1959 containing at least one nitrogen-oxygen compound and, if desired, water vapour.
- silicon transistors an additional effect is obtained, if the gaseous mixture in the envelope, before this envelope is finally closed, is pumped oif partly, preferably down to a pressure of less than 10- mm. Hg.
- a particular embodiment of a semi-conductive electrode system especially a transister according to the invention, contains in the vacuum-tight envelope at least one nitrogen-oxygen compound. There may furthermore be water vapour in the envelope.
- the transistor comprises a thin semi-conductive disc 1 provided with an emitter electrode 2, a collector electrode 3 and an annular ohmic base connection 4.
- the electrodes 2 and 3 and the ohmic connection 4 are each connected to supply conductors 5, 6, 7 passing through a glass pinch 8, and are passed to the outside through the glass base 9, to which the glass bulb 10 is sealed.
- the envelope (9, 10) contains N0 (N 0,) vapour at a pressure of about 10-l mm. Hg.
- Example 1 An alloy transistor device comprising a semi-conductive body consisting of p-type silicon provided with a base connection consisting of an alloy of by weight of indium and 10% by weight of copper, and further provided with an emitter electrode and a collector electrode both consisting of 75% by Weight of gold and 25% by weight of antimony was etched for about twenty seconds in a bath containing a mixture of a 52% aqueous solution of hydrofluoric acid and a 97% aqueous solution of nitric acid in the volume ratio 1:3 and subsequently washed in streaming distilled deionised water and dried. Subsequent to the etching treatment, the transistor was arranged in a glass envelope containing dry nitrogen dioxide (di-nitrogen-tetroxide).
- the current amplification factor a which amounted to 5 after the etching treatment, rose by this treatment almost immediately to a value 15. Then water vapour was introduced into the envelope to a quantity of less than 1% of the N0 content, which increased a further to the value 18. During the pumping out of this gaseous mixture a increased further to attain a maximum value of 22 at a pressure of about 10- mm. Hg, after which the glass envelope was sealed tight. In order to check the stability of the transistor, the structure was then heated, so that ar increased continuously until at C. a maximum value of 50 was attained. During the cooling to room temperature the same range of variations was reversed, which confirms the stability of the transistor.
- Example 2 An alloy transistor comprising a semi-conductive body consisting of n-type germanium, provided with a base connection consisting of an alloy of 97% by weight of tin and 3% by weight of antimony, and further provided with an emitter electrode and a collector electrode both consisting of indium, was etched in a bath composed of 2 volume parts 52% aqueous solution of HF, 2 volume parts 97% aqueous solution of HN and volume parts H 0, and subsequently washed in distilled deionised water and dried. The transistor had a current amplification factor of 15.2 after this etching operation. The-transistor was subsequently arranged in an envelope containing dry nitrogen dioxide (di-nitrogen-tetroxide) at a pressure of about mm. Hg.
- dry nitrogen dioxide di-nitrogen-tetroxide
- a method of manufacturing a semi-conductive device comprising a semi-conductive body and plural electrode connections to said body and possessing a current amplification factor whose value depends on the surrounding atmosphere, comprising the steps of etching the body, and thereafter introducing the body with its electrode connections into an atmosphere containing a nitrogenoxygen compound.
- a method of manufacturing a semi-conductive device comprising a semi-conductive body selected from the group consisting of germanium and silicon and having ohmic and rectifying electrode connections to said body, comprising etching the body, and thereafter introducing the body with its electrode connections into an atmosphere containing a nitrogen-oxygen compound.
- a semi-conductive device comprising an etched semi-conductive body with plural electrode connections to said body and possessing a current amplification factor whose value depends on the surrounding atmosphere, a sealed envelope enclosing the body with its connections, and an atmosphere in said envelope comprising a nitrogen-oxygen compound.
- a semi-conductive device comprising an etched semi-conductive body selected from the group consisting of germanium and silicon, ohmic and rectifying electrode connections to said body, a vacuum-tight sealed envelope enclosing the body with its connections, and an atmosphere in said envelope comprising a nitrogen-oxygen compound.
- nitrogen-oxygen compound is selected from the group consisting of nitrogen dioxide and di-nitrogen-tetroxide.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Electrodes Of Semiconductors (AREA)
- Thin Film Transistor (AREA)
- Weting (AREA)
Description
TRANSISTOR Filed Feb. 14, 1957 m luxlww INVENTOR s LOUIS MARIUS NIJLAND JAN ADRlAN US MANINTVELD BY 7 2 Z 2 I 4 AGENT United States Patent O TRANSISTOR Application February 14, 1957, Serial No. 640,212
Claims priority, application Netherlands February 29, 1956 9 Claims. (Cl. 317-234) The invention relates to a method of producing a semiconductive electrode system, more particularly a transistor, in which a semi-conductive body .of, for example, germanium or silicon is provided with at least one rectifying electrode and an ohmic connection, this structure being then etched and housed in an envelope.
The invention furthermore relates to a semi-conductive electrode system, more particularly a transistor, housed in an airtight'envelope.
The invention has been found to be of particular importance for transistors, for the purpose of increasing the current amplification factor ea which is defined by the equation:
wherein I and l designate the collector current and the base current respectively, measured at a constant collector voltage V It is already known that the current amplification factor of germanium transistors and particularly of silicon transistors can be enhanced by coating their semi-conductive surfaces with a layer of oxidizing material, for example, lead minium, zinc chromate or strontium chromate, and, furthermore, that organic compounds may be used for this purpose. By experiments it has been found, however, that the transistors thus manufactured are often not stable at higher temperatures.
The invention has for its object to provide inter alia a method by which a semi-conductive electrode system having a high current amplification factor and great stability can be manufactured. It has furthermore the advantage that, in a simple manner, the surface of the semiconductive body can be coated with very thin, effective layers even of molecular thickness.
In accordance with the invention the semi-conductive body with its electrode and ohmic connection is introduced, subsequent to the etching operation, into a milieu containing at least a nitrogen-oxygen compound.
Use is preferably made of a nitrogen-oxygen compound which contains molecules of N and N 0 the equilibrium shifting in the direction of the first-mentioned compound at higher temperatures. In order to increase the effect water vapour may also be added.
It is further noted that the results obtainable by the method according to the invention are in general not dependent upon the special etching solution'employed.
Although the invention is not restricted to a particular semi-conductive substance, it is particularly suitable for use with semi-conductive electrode systems, for example, alloy transistors, of which the semi-conductive body consists of silicon, since by the conventional means, which in the case of germanium yielded satisfactory values of the current amplification factor, unsatisfactory results are obtained in the case of silicon.
A particular embodiment of the invention consists in that the semi-conductive body with its electrode ,and ohmic connection is arranged in a vacuum-tight envelope 2,887,630 Patented May 19, 1959 containing at least one nitrogen-oxygen compound and, if desired, water vapour. With silicon transistors an additional effect is obtained, if the gaseous mixture in the envelope, before this envelope is finally closed, is pumped oif partly, preferably down to a pressure of less than 10- mm. Hg.
A particular embodiment of a semi-conductive electrode system, especially a transister according to the invention, contains in the vacuum-tight envelope at least one nitrogen-oxygen compound. There may furthermore be water vapour in the envelope.
It should be noted that the favourable effect of such a gaseous milieu or atmosphere is, of course, not restricted to transistors, but that similar effects will be obtained when the invention is applied to other semi-conductive electrode systems.
By way of example one embodiment of a semi-conduc tive electrode system according to the invention will now be described with reference to the sole figure in the accompanying drawing, which shows in cross-section, a transistor according to the invention.
Referring now-to the figure, the transistor comprises a thin semi-conductive disc 1 provided with an emitter electrode 2, a collector electrode 3 and an annular ohmic base connection 4. The electrodes 2 and 3 and the ohmic connection 4 are each connected to supply conductors 5, 6, 7 passing through a glass pinch 8, and are passed to the outside through the glass base 9, to which the glass bulb 10 is sealed. The envelope (9, 10) contains N0 (N 0,) vapour at a pressure of about 10-l mm. Hg.
The method according to the invention will now be described more fully with reference to a few examples.
Example 1 An alloy transistor device comprising a semi-conductive body consisting of p-type silicon provided with a base connection consisting of an alloy of by weight of indium and 10% by weight of copper, and further provided with an emitter electrode and a collector electrode both consisting of 75% by Weight of gold and 25% by weight of antimony was etched for about twenty seconds in a bath containing a mixture of a 52% aqueous solution of hydrofluoric acid and a 97% aqueous solution of nitric acid in the volume ratio 1:3 and subsequently washed in streaming distilled deionised water and dried. Subsequent to the etching treatment, the transistor was arranged in a glass envelope containing dry nitrogen dioxide (di-nitrogen-tetroxide). The current amplification factor a which amounted to 5 after the etching treatment, rose by this treatment almost immediately to a value 15. Then water vapour was introduced into the envelope to a quantity of less than 1% of the N0 content, which increased a further to the value 18. During the pumping out of this gaseous mixture a increased further to attain a maximum value of 22 at a pressure of about 10- mm. Hg, after which the glass envelope was sealed tight. In order to check the stability of the transistor, the structure was then heated, so that ar increased continuously until at C. a maximum value of 50 was attained. During the cooling to room temperature the same range of variations was reversed, which confirms the stability of the transistor.
Example 2 An alloy transistor comprising a semi-conductive body consisting of n-type germanium, provided with a base connection consisting of an alloy of 97% by weight of tin and 3% by weight of antimony, and further provided with an emitter electrode and a collector electrode both consisting of indium, was etched in a bath composed of 2 volume parts 52% aqueous solution of HF, 2 volume parts 97% aqueous solution of HN and volume parts H 0, and subsequently washed in distilled deionised water and dried. The transistor had a current amplification factor of 15.2 after this etching operation. The-transistor was subsequently arranged in an envelope containing dry nitrogen dioxide (di-nitrogen-tetroxide) at a pressure of about mm. Hg. Owing to this treatment u increased almost immediately to 32. By adding moist nitrogen dioxide (di-nitrogen-tetroxide) a increased further to the value 40 at a NO (N O pressure of about 10- mm. Hg and a water vapour pressure of about 10' mm. Hg. After sealing the transistor in a glass envelope the structure was heated to 65 C., at which temperature 06 attained the value 41.5; during cooling to room temperature about the same range of variations was reversed, and at room temperature ea had decreased to a value of about 40, which confirms the good stability of the transistor.
What is claimed is:
l. A method of manufacturing a semi-conductive device comprising a semi-conductive body and plural electrode connections to said body and possessing a current amplification factor whose value depends on the surrounding atmosphere, comprising the steps of etching the body, and thereafter introducing the body with its electrode connections into an atmosphere containing a nitrogenoxygen compound.
2. A method of manufacturing a semi-conductive device comprising a semi-conductive body selected from the group consisting of germanium and silicon and having ohmic and rectifying electrode connections to said body, comprising etching the body, and thereafter introducing the body with its electrode connections into an atmosphere containing a nitrogen-oxygen compound.
3. A method as set forth in claim 2 wherein the atmosphere also contains water vapor.
4. A method as set forth in claim 2 wherein the atmosphere is partly removed and then the body with its electrode connections sealed-off in a vacuum-tight envelope.
5. A semi-conductive device comprising an etched semi-conductive body with plural electrode connections to said body and possessing a current amplification factor whose value depends on the surrounding atmosphere, a sealed envelope enclosing the body with its connections, and an atmosphere in said envelope comprising a nitrogen-oxygen compound.
6. A semi-conductive device comprising an etched semi-conductive body selected from the group consisting of germanium and silicon, ohmic and rectifying electrode connections to said body, a vacuum-tight sealed envelope enclosing the body with its connections, and an atmosphere in said envelope comprising a nitrogen-oxygen compound.
7. A device as set forth in claim 6 wherein the nitrogen-oxygen compound is selected from the group consisting of nitrogen dioxide and di-nitrogen-tetroxide.
8. A device as set forth in claim 6 wherein the atmosphere includes Water vapor.
9. A device as set forth in claim 8 wherein the pressure of the atmosphere is below 10- mm. of mercury, and the semi-conductive body is silicon.
References Cited in the file of this patent UNITED STATES PATENTS 2,812,480 Ellis Nov. 5, 1957
Claims (1)
1. A METHOD OF MANUFACTURING A SEMI-CONDUCTIVE DEVICE COMPRISING A SEMI-CONDUCTIVE BODY AND PLURAL ELECTRODE CONNECTIONS TO SAID BODY AND POSSESSING A CURRENT AMPLIFICATION FACTOR WHOSE VALUE DEPENDS ON THE SURROUNDING ATMOSPHERE, COMPRISING THE STEPS OF ETCHING THE BODY, AND THEREAFTER INTRODUCING THE BODY WITH ITS ELECTRODE CONNECTIONS INTO AN ATMOSPHERE CONTAINING A NITROGENOXYGEN COMPOUND.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL205006 | 1956-02-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2887630A true US2887630A (en) | 1959-05-19 |
Family
ID=19750747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US640212A Expired - Lifetime US2887630A (en) | 1956-02-29 | 1957-02-14 | Transistor |
Country Status (7)
Country | Link |
---|---|
US (1) | US2887630A (en) |
BE (1) | BE555370A (en) |
CH (1) | CH351341A (en) |
DE (1) | DE1051984B (en) |
FR (1) | FR1167317A (en) |
GB (1) | GB831815A (en) |
NL (2) | NL205006A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3145328A (en) * | 1957-04-29 | 1964-08-18 | Raytheon Co | Methods of preventing channel formation on semiconductive bodies |
US3244947A (en) * | 1962-06-15 | 1966-04-05 | Slater Electric Inc | Semi-conductor diode and manufacture thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2812480A (en) * | 1954-06-23 | 1957-11-05 | Rca Corp | Method of treating semi-conductor devices and devices produced thereby |
-
0
- BE BE555370D patent/BE555370A/xx unknown
- NL NL94711D patent/NL94711C/xx active
- NL NL205006D patent/NL205006A/xx unknown
-
1957
- 1957-02-14 US US640212A patent/US2887630A/en not_active Expired - Lifetime
- 1957-02-23 DE DEN13347A patent/DE1051984B/en active Pending
- 1957-02-26 GB GB6434/57A patent/GB831815A/en not_active Expired
- 1957-02-26 CH CH351341D patent/CH351341A/en unknown
- 1957-02-28 FR FR1167317D patent/FR1167317A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2812480A (en) * | 1954-06-23 | 1957-11-05 | Rca Corp | Method of treating semi-conductor devices and devices produced thereby |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3145328A (en) * | 1957-04-29 | 1964-08-18 | Raytheon Co | Methods of preventing channel formation on semiconductive bodies |
US3244947A (en) * | 1962-06-15 | 1966-04-05 | Slater Electric Inc | Semi-conductor diode and manufacture thereof |
Also Published As
Publication number | Publication date |
---|---|
GB831815A (en) | 1960-03-30 |
FR1167317A (en) | 1958-11-24 |
NL94711C (en) | |
CH351341A (en) | 1961-01-15 |
BE555370A (en) | |
NL205006A (en) | |
DE1051984B (en) | 1959-03-05 |
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