BE856702A - Stratifies ignifuges pour l'industrie electrique et electronique - Google Patents
Stratifies ignifuges pour l'industrie electrique et electroniqueInfo
- Publication number
- BE856702A BE856702A BE179257A BE179257A BE856702A BE 856702 A BE856702 A BE 856702A BE 179257 A BE179257 A BE 179257A BE 179257 A BE179257 A BE 179257A BE 856702 A BE856702 A BE 856702A
- Authority
- BE
- Belgium
- Prior art keywords
- fire
- electrical
- electronic industry
- resistant laminates
- laminates
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
- B32B23/14—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose characterised by containing special compounding ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/08—Impregnating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/185—Substances or derivates of cellulose
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/48—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials
- H01B3/52—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials wood; paper; press board
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2317/00—Animal or vegetable based
- B32B2317/12—Paper, e.g. cardboard
- B32B2317/125—Paper, e.g. cardboard impregnated with thermosetting resin
-
- 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
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/92—Fire or heat protection feature
- Y10S428/921—Fire or flameproofing
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
- Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249954—With chemically effective material or specified gas other than air, N, or carbon dioxide in void-containing component
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249986—Void-containing component contains also a solid fiber or solid particle
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/254—Polymeric or resinous material
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31721—Of polyimide
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
- Y10T428/31797—Next to addition polymer from unsaturated monomers
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31942—Of aldehyde or ketone condensation product
- Y10T428/31949—Next to cellulosic
- Y10T428/31964—Paper
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/659—Including an additional nonwoven fabric
- Y10T442/673—Including particulate material other than fiber
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/696—Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/699—Including particulate material other than strand or fiber material
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Reinforced Plastic Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7621252A FR2358271A1 (fr) | 1976-07-12 | 1976-07-12 | Stratifies ignifuges pour l'industrie electrique et electronique |
Publications (1)
Publication Number | Publication Date |
---|---|
BE856702A true BE856702A (fr) | 1978-01-11 |
Family
ID=9175587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE179257A BE856702A (fr) | 1976-07-12 | 1977-07-11 | Stratifies ignifuges pour l'industrie electrique et electronique |
Country Status (9)
Country | Link |
---|---|
US (1) | US4150188A (fr) |
JP (1) | JPS5327674A (fr) |
BE (1) | BE856702A (fr) |
DE (1) | DE2731251B2 (fr) |
DK (1) | DK313177A (fr) |
FR (1) | FR2358271A1 (fr) |
GB (1) | GB1584388A (fr) |
LU (1) | LU77716A1 (fr) |
NL (1) | NL7707640A (fr) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA791450B (en) * | 1978-04-07 | 1980-04-30 | Bristol Composite Mat | Antistatic fire-retardant structures particularly pipes of reinforced plastics material |
US4288491A (en) * | 1979-03-13 | 1981-09-08 | Surzhenko Evgeny M | Laminated plastic material |
DE3022431C2 (de) * | 1980-06-14 | 1984-03-08 | Dynamit Nobel Ag, 5210 Troisdorf | Verfahren zur Herstellung von Hartpapier |
JPS61180981U (fr) * | 1985-04-30 | 1986-11-11 | ||
IT1186188B (it) * | 1985-11-08 | 1987-11-18 | Pirelli Cavi Spa | Nastro composito per l'isolamento di cavi elettrici e cavo elettrico che utilizza tale nastro per il suo isolamento |
US5543447A (en) * | 1994-09-28 | 1996-08-06 | Southwest Research Institute | Stabilization of red amorphous phosphorus by ordered polymeric structures for the manufacture of non-emissive fire retardant plastics |
DE10020228A1 (de) * | 2000-04-25 | 2001-10-31 | Abb Research Ltd | Hochspannungsisolationssystem |
US20050074595A1 (en) * | 2003-10-03 | 2005-04-07 | Lam Robert C. | Friction material containing partially carbonized carbon fibers |
US20050075021A1 (en) * | 2003-10-03 | 2005-04-07 | Lam Robert C. | High performance, durable, deposit friction material |
US8021744B2 (en) * | 2004-06-18 | 2011-09-20 | Borgwarner Inc. | Fully fibrous structure friction material |
US8603614B2 (en) | 2004-07-26 | 2013-12-10 | Borgwarner Inc. | Porous friction material with nanoparticles of friction modifying material |
US7429418B2 (en) | 2004-07-26 | 2008-09-30 | Borgwarner, Inc. | Porous friction material comprising nanoparticles of friction modifying material |
US7806975B2 (en) * | 2005-04-26 | 2010-10-05 | Borgwarner Inc. | Friction material |
CN101300297A (zh) * | 2005-11-02 | 2008-11-05 | 博格华纳公司 | 碳摩擦材料 |
US20090048369A1 (en) * | 2006-03-29 | 2009-02-19 | Newcomb Timothy P | Friction Materials Made With Resins Containing Polar Functional Groups |
EP2028221A1 (fr) * | 2007-08-03 | 2009-02-25 | Borgwarner, Inc. | Matériau de friction avec du silicone |
DE102008013907B4 (de) | 2008-03-12 | 2016-03-10 | Borgwarner Inc. | Reibschlüssig arbeitende Vorrichtung mit mindestens einer Reiblamelle |
DE102009030506A1 (de) * | 2008-06-30 | 2009-12-31 | Borgwarner Inc., Auburn Hills | Reibungsmaterialien |
EP2664602A3 (fr) | 2012-05-14 | 2014-10-01 | UPL Limited | Phosphore particulaire revêtu, compositions et produits les contenant et procédés de préparation |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3395105A (en) * | 1964-10-06 | 1968-07-30 | Mc Donnell Douglas Corp | Epoxy systems containing encapsulated pressure fracturable curing agents |
US3422046A (en) * | 1966-02-03 | 1969-01-14 | Sherwin Williams Co | Coating containing a condensate of a phosphate ether polyol and a melamine,an alkylated amine,and a halogenated hydrocarbon |
SE357911B (fr) * | 1970-07-03 | 1973-07-16 | Perstorp Ab | |
FR2166624A5 (fr) * | 1971-12-29 | 1973-08-17 | Dow Chemical Co | |
JPS4983776A (fr) * | 1972-12-15 | 1974-08-12 | ||
JPS49115186A (fr) * | 1973-03-09 | 1974-11-02 | ||
JPS50128784A (fr) * | 1974-03-30 | 1975-10-11 | ||
US3939107A (en) * | 1974-09-06 | 1976-02-17 | Monsanto Company | Fire-retardant particle board and binder therefor from aminoplast with ammonium polyphosphate-formaldehyde product |
US4035315A (en) * | 1976-05-03 | 1977-07-12 | Arco Polymers, Inc. | Fire-resistant styrene polymer foams |
-
1976
- 1976-07-12 FR FR7621252A patent/FR2358271A1/fr active Granted
-
1977
- 1977-07-08 LU LU77716A patent/LU77716A1/xx unknown
- 1977-07-08 NL NL7707640A patent/NL7707640A/xx not_active Application Discontinuation
- 1977-07-11 GB GB29031/77A patent/GB1584388A/en not_active Expired
- 1977-07-11 DE DE2731251A patent/DE2731251B2/de not_active Withdrawn
- 1977-07-11 DK DK313177A patent/DK313177A/da unknown
- 1977-07-11 BE BE179257A patent/BE856702A/fr unknown
- 1977-07-11 US US05/814,392 patent/US4150188A/en not_active Expired - Lifetime
- 1977-07-12 JP JP8261777A patent/JPS5327674A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2731251A1 (de) | 1978-01-26 |
NL7707640A (nl) | 1978-01-16 |
DK313177A (da) | 1978-01-13 |
FR2358271A1 (fr) | 1978-02-10 |
JPS5327674A (en) | 1978-03-15 |
FR2358271B1 (fr) | 1980-03-07 |
US4150188A (en) | 1979-04-17 |
LU77716A1 (fr) | 1978-02-02 |
GB1584388A (en) | 1981-02-11 |
DE2731251B2 (de) | 1979-07-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BE856702A (fr) | Stratifies ignifuges pour l'industrie electrique et electronique | |
JPS5352926A (en) | Inverter circuit | |
KR850009741U (ko) | 전자 기기용 케이스 | |
KR850009742U (ko) | 전자 기기용 케이스 | |
DE3065150D1 (en) | Improved electronic device having multilayer wiring structure | |
JPS52139958A (en) | Multilayer circuit | |
FR2629665B1 (fr) | Boitier pour circuit electronique | |
GB1558209A (en) | Electrical circuits | |
GB1543095A (en) | Inverter circuits | |
GB2043383B (en) | Electrical oscillator circuits | |
AT377136B (de) | Elektronischer schalter | |
JPS5368870A (en) | Multilayer board | |
FI830324L (fi) | Elektroniskt ballastsystem foer gasurladdningsroer | |
GB2057195B (en) | Multilayer circuit structure | |
KR840000815U (ko) | 전자개폐장치 | |
BE857079R (fr) | Coffret pour equipements electroniques | |
JPS55158697A (en) | Multilayer wiring substrate | |
JPS5342504A (en) | Power circuit for telephone set or the like | |
JPS5312028A (en) | Inverter circuit | |
IT1163604B (it) | Commutatore centrale elettronico | |
JPS5679425A (en) | Multilayer electric circuit board | |
JPS5671992A (en) | Multilayer wiring contact hole structure | |
GB1551964A (en) | Electronic circuits | |
GB1557508A (en) | Inverter circuit | |
JPS5341730A (en) | Inverter circuit |