baber/WOPTO huggingface dataset:
Patent CS-271425-B1 (CS)
Title: Device for regulation of fuel's ignition instant in dependence on two-fuel gas engine's air excess
Inventor: MELTZER MIROSLAV ING CSC
IPC: F02M21/04
Filed: 1987-09-23
Abstract: The solution involves a device for gas ignition point regulation according to the air surplus of a two-component gas engine with an auxiliary injection whose principle is that a unit (4) of an ignition point of the change of the liquid fuel pump (6) is mechanically, by means of a drag link (10) connected with a primary actuator (5) of a engine power governor (1) and with the regulator (11) of a gas fuel inlet (2) before its input into a gas mixer (7), or, the gas ignition point change unit is directly connected with a secondary actuator (9) of the engine power governor (1), where the setting of the pre-injection by the ignition point change unit (4) of the liquid fuel pump (6) by means of the secondary actuator (9) of the power governor is dependent on the position of the regulator (11) of the gas fuel inlet (2).<IMAGE>
Patent CS-228823-B1 (CS)
Inventor: KOLEK LEO ING
IPC: B23F17/00
Filed: 1982-09-23
Abstract: Vynález řeží opravy defektníoh zubů na
ozubeném kole nebo tyči a Je vhodný
zejména pro případ kdy přístup k ozubení
je možný pouze z jedné strany.
Oprava se provádí tím způsobem, že
v místě původního zubu nebo zubů se vytvoří
prohlubeň do níž se vkládají lamely,
které ae připojí např. svarem,
k tělesu ozubeného kola nebo tyěe. Kromě
toho se lamely spojí i mezi sebou
navzájem v jeden celek.
Patent CS-218532-B1 (CS)
Inventor: KREPELKA JIRI
IPC: C07D457/02
Filed: 1981-09-30
Abstract: Vynález še týká způsobu výroby 2-substitučních
derivátů ©rigolinu-I, obsahujících v
poloze 2 zbytek akryloylové skupiny, substituované
na beta-uhlíku aromatickým nebo
heteroaromatiťkým substituentem. Příprava
látek tohoto typu spočívá v aldolizační
reakci 2-acetyl-6-methyl-8-kyanmethylergolinu-I
s aromatickými, resp. heteroaromatickými
aldehydy v prostředí vodně methanolického
roztoku hydroxidu draselného.
Látky lze použít Jako vhodné meziprodukty
k přípravě biologicky aktivních sloučenin'.
Patent CS-202373-B1 (CS)
Inventor: KUNIAK LUDOVIT
IPC: C12N11/14
Filed: 1978-11-13
Abstract: Přihláška vynálezu sa týká přípravy imobilizovaných enzýmov viazaných na perlovej 
celulóze obsahujúcej karbonylové skupiny.
Principy imobilizácie enzýmov na róznych polymérnych nosičoch sú dnes dostatočné známe nielen z literárnych údajov fjíethods in Enzymology, Vol. XLIV, Immobilized Enzames, 
Ed. Klaus Morbach, Academie Press, New York, San Francisko, London 1976J, ale i mnohých 
praktických aplikácií tak vo výskume, ako i v priemyslovej praxi.
Chemická imobilizácia enzýmov na vhodnom nosiči patří k najrozšírenejším spósobom 
imobilizácie, pričom ako nosič sa používajú rózne syntetické polyméry, ale i přírodně 
polysacharidy: škrob, celulóza, dextrany a i. Ak sa použije ako nosič vláknitá alebo práš
ková celulóza, je potřebné před imobilizáciou enzýmu vytvořit na celulóze vhodnú funkčnú 
skupinu, ktorá je schopná v druhom stupni kovalentne intereagovať s příslušnými skupinami 
enzýmu. Takouto skupinou je napr. karbonylové skupina, ktorá sa velmi jednoducho vytvoří 
známou oxidáciou celulózy, resp. iného polysacharidů s jodistanom draselným. (T. P. Novell: 
Methods in Carbohydrate Chemistry New York 1963, str. 165-68).
Je však známe, že polymérny nosič, na ktorom je enzým viazaný má zásadný význam na 
aplikačně možnosti imobilizovaných enzýmov v priemyslovej praxi. Polymérny nosič musí meť 
dostatočné velký napúčací objem v reakčnom médiu, aby bola zabezpečená dostatočné rýchlosť 
difúzie substrátu k aktívnym centrám imobilizovaného enzýmu.
Patent CS-229333-B1 (CS)
Inventor: AUTRATA RUDOLF ING CSC
IPC: G01T1/20
Filed: 1982-11-03
Abstract: Vynález se týká dvojitého acintilačního
- detektoru určeného k dvoj! detekci sekundárních,
nebo zpétné odražených
elektronů pro rastrovací elektronové
mikroskopy.
Podstatou detektoru jsou dvé detekční
jednotky, první s monokryata lickým
deskovým sointilátorem se středovým
otvorem a druhá s monokrystaliokým
aointilačním kotoučkem spojené přes
světlovody do.oentrické koncovky doléhající
k fotokatodé fotonásobiče, přičemž
mezi ním a avétlovodným prstencem je
uspořádána stavitelná kruhová clona.
Dvojitý detektor Je určen výlučné
pro rastrovací elektronové mikroskopy.
Patent CS-246547-B1 (CS)
Title: Apparatus for feeding of textile tubes
Inventor: MANEK ALES
IPC: B65G47/84
Filed: 1984-10-18
Abstract: The invention relates to an apparatus for feeding bobbin tubes in textile mills in the axial direction to the stock boxes of a horizontal grooved container. The object of the invention is to improve the apparatus mentioned in the introduction, in such a way that it can also work reliably when tubes of any kind, even conical or perforated tubes or tubes made of paper, are used. To achieve this object, according to the invention the normally vertical drivers are provided with a rearwardly directed suspension part for the temporary free suspension of the front tube edge during its movement above the stock box and during its simultaneous tilting for the purpose of falling.
Patent CS-257373-B1 (CS)
Inventor: GABCO MILAN
IPC: C05B7/00
Filed: 1986-11-11
Abstract: Riešenie sa týká spósobu výroby taveniny
kondenzovaných fosforečnanov amonných
vznikajúcich vysokoteplotnou neutralizá-
ciou fosíorečnej kyseliny amoniakom. Kontinuálně]
vysokoteplotně] neutralizácii amoniakom
sa podrobí horúci produkt reakcie
fosíorečnej kyseliny s oxidmi fosforu
vznikajúcimi pri hoření elementárneho fosforu.
Na každý hmotnostný diel oxidu fosforečného
dávkovaného do procesu vo formě
fosíorečnej kyseliny sa do reakcie dávkuje
0,02 až 0,80 hmotnostných dielov elementárneho
fosforu a 0,14 až 0.44 hmotnostných
dielov amoniaku.
Patent CS-212435-B1 (CS)
Title: Air-pressure control brake with the spring accumulators
Inventor: BECKERT DIETER
IPC: B60T13/38
Filed: 1977-12-09
Abstract: The steering brake for farm tractors and machines ensures that both the service brake and the parking brake remain operational when it is used. Each of the steered wheels is controlled by a brake cylinder in the form of double-action cylinder featuring a spring energy storage. The cylinder rod operates the wheel brake through a cable when the directional control valve is set and the pedal activates the steering brake valve. If the control valve has its handle set in the zero position, the steering brake is inoperative. The parking brake remains operational through a valve which is connected to the piston end chamber of the cylinder.
Patent CS-261613-B1 (CS)
Inventor: ADAMEK ZDENEK ING
IPC: G03F7/00
Filed: 1985-12-20
Abstract: Lak je tvořen roztokem polymerů ze skupiny
kyseliny akrylové a/nebo metakrylové
nebo jejich kopolymerů s akryláty nebo metakryláty
nebo s akrylonitrilem, nebo khpolymerů
akrylátů a/nebo metakrylátů s akrylonitrilem,
nebo kopolymerů maleinanhydridu
se styrenem, přičemž obsah sušiny polymeru
nebo kopolymerů ve vodném roztoku
je roven 3 až 60 % hmotnosti, vztaženo na
hmotnost roztoku.
Patent CS-255998-B1 (CS)
Inventor: STRASAK TOMAS
IPC: B21D22/21
Filed: 1985-12-21
Abstract: Řešení se týká zařízení k provádění
hlubokého tažení součástí bez příruby.
Podstatou zařízení je, že v dutině tažné
komory je uspořádán alespoň jeden nákružek
pro změnu velikosti tažné vůle hydromechanického
tažení na velikost tažné
vůle prostého hlubokého tažení, přičemž
nákružek je uspořádán pod zaoblenou
tažnou hranou tažné komory.
Patent CS-245967-B1 (CS)
Inventor: KUKLA MILAN
IPC: H02G3/32
Filed: 1984-12-17
Abstract: Příchytka je třmenovitého tvaru s rozvidlenými
bočními rameny, na jejichž koncích
jaou směrem dovnitř třmenu provedeny
ozuby. Ramena jaou nahoře spojena můstkem
který je uprostřed vyhnut směrem dovnitř
třmenu a opatřen v těchto místech uvnitř
dosedací rýhovanou ploškou. Vnitřní konce
rozvAdlených ramen jsou směrem vzhůru
skoseny, čímž jsou z obou stran náběhové
plošky
Patent CS-244247-B1 (CS)
Inventor: GLASER VLADIMIR
IPC: C01B25/32
Filed: 1984-12-17
Abstract: Tetrahydrát hydrogenfosforečnanu sodnoamonného
a roztok vodorozpustné vápenaté
soli se uvedou do reakce, ze vzniklé suspenze
se oddělí sraženina, která se dále zpracuje
na požadovaný produkt. Ze zbylého roztoku
obsahujícího amonnou sůl a sodnou sůl se
přidáním páleného vápna regeneruje amoniak
a roztok vodorozpustné vápenaté soli, který
lze po snížení obsahu sodné soli vrátit do
výroby. Přitom je výhodné přidávat během
výroby stabilizátory zpomalující dehydrataci
dihydrátu nebo hydrolýzu bezvodého hydrogenfosforečnanu
vápenatého.
Produkt je vhodný k použití v kosmetickém,
potravinářském a farmaceutickém průmyslu
a jako obohacující přísada krmných/směsí
v živočišné výrobě.
Patent CS-252098-B1 (CS)
Inventor: HASIK JAN
IPC: A43B23/02
Filed: 1985-12-27
Abstract: Řešení se týká výroby svršků obuvi,
u plohž ae uplatňuje kombinace dílů z
usnovýoh výseků a výseků z laminátových
materiálů, zdobených působením elektrod
s vysokofrekvenčním ohřevem. Účelem Je
zajistit plynulý spol mezi těmito dvěma
druhy svrškovýoh dílů, aniž by bylo nutno
kosit Jejloh okraje, oož u dýlů z laminátovýoh
materiálů ani nelze. Účelu se dosahuje
tím, že svrškový díl z laminátového
materiálu vykazuje plošky prostorově
zhutněného materiálu, přičemž tyto plošky
prostorově zhutněného materiálu Jsou
uspořádány funkčně po obvodu svrškového
dílu a upraveny tak, že obrysově tvoří
negativní obrys a lůžko dílu, s nimiž
Jsou vs výsledné obuvi spojeny šitím nebo
slepováním v Jeden celek.
Patent DK-166971-B1 (DK)
Inventor: BREWER DONALDEE
IPC: G05D16/06
Filed: 1986-05-16
Granted: 1993-08-09
Abstract: This invention is directed to a differential control valve. The differential pressure is maintained by differing area surfaces on a piston assembly which will be balanced at a predetermined differential established at the manufacturing operation. There is a spring member operating on two valve balls which provides a delayed pressurization of the controlled chamber. The control valve has a ball valve at the exit port to control the low pressure side of the differential control valve assembly, providing a fail-safe system with no adjustments required after manufacture if there is a pressure increase downstream.
Patent DK-169894-B1 (DK)
Inventor: AGGARWAL BHARAT BHUSHAN
IPC: C07K14/525
Filed: 1985-07-04
Granted: 1995-03-27
Abstract: Methods and compositions are provided for the purification of a protein identified as tumor necrosis factor from nonrecombinant and recombinant sources, the preparation of nucleic acid encoding this tumor necrosis factor and for its expression in recombinant hosts. This tumor necrosis factor is used in the therapeutic treatment of malignant tumors, either alone or in synergistic combination with an interferon.
Patent DK-174627-B1 (DK)
Inventor: LIN TAI-SHUN
IPC: C07D405/04
Filed: 1987-10-23
Granted: 2003-07-28
Abstract: This invention relates to the use of 3'-deoxythymidin-2'-ene (3'-deoxy-2',3'-didehydrothymidine) in treating patients infected with a retrovirus.
Patent FI-101246-B1 (FI)
Inventor: MERIO RAOUL
IPC: H02H9/04
Filed: 1987-09-01
Granted: 1998-05-15
Abstract: A battery jumper cable comprises a first electrically insulated flexible low-voltage conductor having two end portions each electrically connected to a pair of pole pliers and a second electrically insulated flexible low-voltage conductor having two end portions each electrically connected to an insulated pair of pole pliers. To prevent the occurrence of high peak voltages which may affect vehicle electronics during a jumper operation between a powering storage battery of the one vehicle and a discharged storage battery of another vehicle, there is provided at least one electrical connection between the first low-voltage conductor and the second low-voltage conductor. This electrical connection has at least one voltage-dependent resistor exhibiting a forward voltage in excess of the operating voltage of conventional starting batteries for automotive vehicles. The voltage-dependent resistor may be accommodated within a housing.
Patent FI-101630-B1 (FI)
Inventor: JOHANSSON JAN-ALLAN
IPC: C04B20/02
Filed: 1992-04-03
Granted: 1998-07-31
Abstract: The invention relates to a method of preparing a silicate based binder containing a filler by treating a filler with an acid in a slurry which then is mixed with an aqueous solution of an alkali metal silicate. The invention also relates to a heat expandable composition.
Patent IE-39265-B1 (IE)
Title: Anti coagulant 3-tetrahydronaphthyl-4-hydroxycoumarin derivatives
IPC: A01N43/14
Filed: 1974-05-13
Abstract: 1458670 3-Tetrahydronaphthyl-4-hydroxycoumarin derivatives WARD BLENKINSOP & CO Ltd 23 May 1974 [23 May 1973 25 May 1973 1 March 1974] 24685/73 25264/73 and 9450/74 Heading C2C Novel compounds of the Formula I wherein R<SP>1</SP> and R<SP>2</SP> are the same or different and are hydrogen, halogen, alkyl or alkoxy, R<SP>3</SP> is an (R<SP>4</SP>) m substituted phenyl where m is 1 or 2 and R<SP>4</SP> is the same or different and is halogen, alkyl, alkoxy, cycloalkyl, aralkyl or optionally halogen substituted phenyl or phenoxy, may be prepared by reacting 4-hydroxy coumarin with a compound of the Formula III or IV wherein hal is halogen and optionally separating isomers. 1 - Bromo - 3 - p - diphenyltetralin is prepared by bromination of 3-p-diphenyltetralin-1-ol. 3 - p - Diphenyltetralin - 1 - ol is prepared by reduction of benzyl p-biphenylketone to yield α - benzyl - p . phenylbenzylalcohol followed by chlorination or bromination to yield α-benzyl-pphenylbenzylbromide or chloride which with sodium diethyl malonate followed by hydrolysis yields (1 - p - biphenyl - 2 - phenylethyl)malonic acid which may be decarboxylated to yield 3- p-diphenyl-4-phenyl butyric acid. Both of the above acids cyclize with polyphosphoric acid to yield 3-p-biphenyl tetralin-1-one which is reduced to the required compound. 3 - p - Diphenyl - 4 - phenylbutyric acid is also prepared by reacting benzyl p-biphenyl ketone with ethylbromoacetate and zinc (Reformatsky) to yield ethyl-3-p-biphenyl-3-hydroxy-4-phenyl butyrate which is dehydrated and hydrolysed to 3-benzyl-3-p-biphenyl acrylic acid which is hydrogenated to give the required butyric acid. Compositions of compounds of the Formula I with a carrier may be used as a rodenticide. The compounds are also useful in human medicine.
[GB1458670A]
Patent IE-45286-B1 (IE)
Title: Improvements in or relating to a process for the preparation of asymmetrically 1,3-disubstituted nitroso-urea
IPC: C07C275/66
Filed: 1977-05-25
Abstract: The invention relates to the preparation of novel N-substituted alkyl-N-nitrosocarbamoyl azides and to the compounds obtained thereby. The novel N-substituted alkyl-N-nitrosocarbamoyl azides can be reacted with amines, diamines, aminoalcohols, aminoacids or aminoacid derivatives to prepare unsymmetrically 1,3-disubstituted nitrosoureas which show therapeutical activity.
Patent IE-45070-B1 (IE)
Title: Anthracycline glycoside antibiotics
IPC: A61P31/04
Filed: 1977-05-30
Abstract: A novel anthracycline antibiotic complex designated herein as baumycin complex is produced by fermentation of a baumycin-producing strain of Streptomyces, e.g. Streptomyces coeruleorubidus ME 130-A4 (FERM-P3540, ATCC 31276). The complex and four bioactive components thereof designated baumycin A1, A2, B1 and B2 are useful as antibacterial and antitumor agents.
Patent IE-39002-B1 (IE)
Title: Cyanomethylthioacetylcephalosporins
IPC: A23K20/195
Filed: 1973-07-03
Abstract: New cyanomethylthioacetylcephalosporins of the following general formula, and their salts WHEREIN R is hydrogen, lower alkyl, aralkyl, tri(lower alkyl)silyl, a salt forming ion or the group ; R1 and R2 each is hydrogen, lower alkyl, lower alkenyl, aryl or aralkyl, each of which may be substituted, or R1 and R2 may together complete a carbocyclic ring; R3 is hydrogen, lower alkyl, lower alkenyl, cyclo-lower alkyl, unsaturated cyclo-lower alkyl, aryl, aralkyl or a heterocyclic group; R4 is lower alkyl, aryl or aralkyl and X is hydrogen, hydroxy, lower alkanoyloxy, lower alkoxy, lower alkylthio, aroyloxy, aralkanoyloxy, the radical of a nitrogen base, a quaternary ammonium radical or together X and R represent a bond linking carbon and oxygen in a lactone ring; are useful as antibacterial agents.
[US3855212A]
Patent IE-46999-B1 (IE)
Title: Substituted hexahydro benzopyrano (3,2-c) pyridines, a method of preparing them and medication containing them
IPC: C07D491/18
Filed: 1978-06-20
Abstract: Substituted hexahydro benzopyrano [3,2-c] pyridines, useful as antidepressants, have the formula <IMAGE> where R is hydrogen or a saturated or unsaturated, linear or branched, lower alkyl, or an aralkyl, acyl, dialkylaminoalkyl, carbonylalkyl, alkoxycarbonyl, haloalkoxycarbonyl or aryl radical; R1 is hydrogen, halogen, or lower alkoxy; R2 is hydrogen or halogen; R3 is hydrogen, halogen, lower alkyl, alkoxy nitro or amino, or forms naphthalene with R4 and the benzene ring; R4 is hydrogen, a halogen, or forms naphthalene with R3 and the benzene ring; R5 is hydrogen, lower alkyl, or aralkyl.
[US4201783A]
Patent IE-45255-B1 (IE)
Title: Whipping composition
IPC: A23L15/00
Filed: 1977-07-12
Abstract: An improved whippable whey protein containing composition is provided comprising a whey protein containing product having at least 20% soluble whey protein, in combination with a member selected from the group consisting of gelatin, gelatin and a water soluble polyphosphate, a gum and mixtures thereof, the whey protein containing product being prepared by:
Patent IE-36941-B1 (IE)
Title: New 2,4,5-trisubstituted oxazoles
Inventor: TARZIA G
IPC: C07D/
Filed: 1972-12-04
Abstract: 1374345 Oxazole derivatives GRUPPO LEPETIT SpA 14 Dec 1972 [7 Aug 1972] 53966/72 Heading C2C Novel oxazole derivatives of the formula wherein A is cyclohexyl, thienyl or phenyl optionally substituted by one or more halogen atoms, or C 1-6 alkyl, halo-C 1-6 alkyl, C 1-6 alkoxy, NO 2 , CN, NH 2 , carbamoyl, sulphamoyl or carboxy radicals, and one of the radicals R 1 and R 2 is C 1-6 alkyl and the other is CON(R 3 )R 4 , wherein R 3 is H, C 1-6 alkyl, C 2-6 alkenyl, cycloalkyl, aryl, aryl-C 1-6 alkyl, hydroxy-C 1-6 alkyl, acyloxy-C 1-6 alkyl, OH, NH 2 , C 1-6 alkylideneamino, cycloalkylideneamino, or aralkylideneamino, and R 2 is H, C 1-6 alkyl, C 2-6 alkenyl, cycloalkyl, aryl, aryl-C 1-6 alkyl, hydroxy- C 1-6 alkyl or acyloxy-C 1-6 alkyl, or R 3 and R 4 , together with the N atom to which they are attached form a 5 to 7 membered saturated heterocyclic ring optionally containing further N, O or S atoms, are prepared by reacting the appropriate C 1-6 alkyl 4-(or 5-)-oxazolecarboxylates or 4- (or 5-)-oxazolecarboxylic acid halides with amines of the formula Alternatively compound in which R 3 is C 1-6 alkylideneamino, cycloalkylideneamino or aralkylideneamino may be obtained by reacting compound in which R 3 is NH 2 with the corresponding aldehydes or ketones, and those in which R 3 and/or R 4 is acyloxy-C 1-6 alkyl by acylating the corresponding hydroxy compounds. Ethyl 2 - phenyl - 4 - methyl - 5 - oxasolecarboxylate, 5 - methyl - 2 - phenyl - 4 - oxazolecarboxylic acid chloride, ethyl 5 - methyl - 2 - (2- thienyl) - 4 - oxazolecarboxylate, ethyl 5 - methyl- 2 - (4 - fluorophenyl) 4 - oxazolecarboxylate, 2- (4 - hclorophenyl) - 5 - methyl - 4- oxazolecarboxylic acid chloride, 5 - methyl - 2 - (p - tolyl) - 4- oxazolecarboxylic acid chloride, and 2-cyclohexyl 5 - methyl - 4 - oxazolecarboxylic acid chloride are obtained by known methods. Pharmaceutical compositions, having antiinflammatory and analgesic activities, contain the above novel compounds together with pharmaceutically acceptable carriers.
[GB1374345A]
Patent IE-45566-B1 (IE)
Title: A frame synchronising device
IPC: H04J3/06
Filed: 1977-08-19
Abstract: 1534669 Synchronizing data trains SOC ANON COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 1 Aug 1977 [20 Aug 1976] 32123/77 Heading H4P A device for synchronizing a "frame" of a first data pulse train available on interconnected terminals E1 at a first bit rate H 1 to a second data pulse train at a second bit rate H2 comprises a memory and first and second control circuits 4, 5 for activating respectively the loading of the memory in synchronism with "frame" pulses Ht1 of the first pulse train, and the unloading of the memory in synchronism with the "frame" pulses Ht2 of the second pulse train, the synchronized pulse train being available on terminals S1 which are all interconnected. The memory is consituted by three looped shift register units 1,2 and 3 each having the capacity of one complete frame, whilst the two control circuits have identical structures and cyclically connect the input E1 of the device to the inputs of the shift registers and likewise cyclically connect the ouputs of the shift registers to the output S 1 of the device in such a way that each of the control circuits switches from one register unit to the next only if that next unit is not already activated at the switching instant by the other control circuit.
Patent IE-48853-B1 (IE)
Title: Process for the regeneration of polymer from waste
IPC: B29B11/00
Filed: 1979-10-17
Abstract: A process is disclosed for the production of a polymer of good spinnability from waste. It consists in compressing the finely chopped waste by means of a screw until a bulk density of at least 500 kg/m3 is reached, introducing same into a double screw degassing extruder, and subjecting the molten polymer to a post-condensation operation. The polymer obtained can be used as such in many textile applications and in plastics.
Patent IE-59087-B1 (IE)
Title: Virus vaccine
IPC: A01N63/00
Filed: 1986-07-28
Abstract: Herpesvirus vaccine comprises a properly incapacitated virus having a deletion for a gene encoding a secreted glycoprotein which allows the serological distinction between the vaccine virus and its wild-type progenitor virus. The virus may be e.g. pseudorabies virus, Marek's disease virus or infectious bovine rhinotracheitis virus. Distinguishing between animals infected with a virus and animals vaccinated with a virus comprises vaccinating animals susceptible to the virus with a vaccine comprising the virus having a deletion for at least one gene encoding an antigen of the wild-type progenitor virus, and then serologically distinguishing between such vaccinated animals and those infected with virulent virus without sacrificing the animal.
Patent IE-64626-B1 (IE)
Title: Ceramic composition of matter and its use
Inventor: FOLEY PAUL
IPC: H01L23/15
Filed: 1990-10-24
Abstract: A ceramic composition of matter which is sinterable at low temperatures is composed of a) 40 to 90% by weight of a finely disperse, high-melting oxidic material and b) 10 to 60% by weight of a finely disperse glass having a softening point of 500 DEG to 850 DEG C., a coefficient of thermal expansion (=CTE) of 2 to 5x10-6 K-1 (measured in the interval from 0 DEG to 400 DEG C.) and a dielectric constant of less than 5 (measured at 106 Hz and 20 DEG C.). The finely disperse oxidic material is composed of a mixture of MgO, Al2O3 and SiO2 in an Al2O3/MgO weight ratio of 1.8-4 with an SiO2 weight fraction of 42-65% by weight or an equivalent quantity of corresponding oxide precursors which, on heating, decompose to give these oxides. The MgO or the MgO precursor has a mean grain size of 0.05 to 3 mu m and the SiO2 or the SiO2 precursor has a mean grain size of 2 to 20 mu m. The composition sinters at 900 DEG -1100 DEG C. and is suitable for producing substrates or metallized housings.
[US5145540A]