|
Match
|
Document |
Document Title |
|
|
4415406 |
Chemical etching of polymers for metallizing
The surfaces of polymer articles are conditioned for metallizing by treatment with an etching solution composed of a mixture of sulfuric acid and a carboxylic acid, such as formic or acetic acid.
|
|
|
4410396 |
Metal stripping composition and process
There is disclosed a chemical stripping solution suitable for removing tin and tin-lead alloys from metallized, e.g. copper coated, substrates so as to leave the said substrate reusable comprising...
|
|
|
4410395 |
Method of removing bulk impurities from semiconductor wafers
A method of removing bulk impurities from a semiconductor wafer is described comprising the steps of lapping the front and back surfaces of the wafer to remove 35 to 40 microns of material...
|
|
|
4410393 |
Preparation of steel surfaces for adhesive bonding by etching with H.sub.3 PO.sub.4 -polyhydric alcohol mixture
The invention provides a process and composition for preparing steel surfaces for adhesive bonding. The process involves contacting the steel article with an etchant composition containing...
|
|
|
RE31395 |
Aluminum polishing compositions
Aluminium polishing solutions containing phosphoric, nitric and sulphuric acids provide etched finishes if the proportion of sulphuric acid is increased. The invention inhibits such etching by...
|
|
|
4404039 |
Cleanser for anodized surfaces of aluminum and alloys thereof and method for using same
This invention relates to an improved process for cleaning an anodized surface of aluminum or an alloy thereof where a cleaning agent is applied to the anodized surface and then the cleaning agent...
|
|
|
4401509 |
Composition and process for printed circuit etching using a sulfuric acid solution containing hydrogen peroxide
Compositions are provided suitable for the etching of printed circuits from a laminate of copper metal and an etch resistant backing at a low hydrogen peroxide concentration and at a low...
|
|
|
4395304 |
Selective etching of phosphosilicate glass
A selective chemical etchant solution for phosphosilicate glass includes a carboxylic acid, hydrogen fluoride and water. The invention is also a method for preferentially etching the...
|
|
|
4386004 |
Composition for treating masonry materials
A composition for treating masonry materials comprises a mixture of water, a light-duty liquid detergent composition, methyl salicylate, calcium chloride and muriatic acid. The composition is...
|
|
|
4383857 |
Attack polish for nickel-base alloys and stainless steels
A chemical attack polish and polishing procedure for use on metal surfaces such as nickel base alloys and stainless steels. The chemical attack polish comprises Fe(NO 3 ) 3 , concentrated CH 3 ...
|
|
|
4380490 |
Method of preparing semiconductor surfaces
A method of treating semiconductor surfaces to produce an abrupt dielectric discontinuity between the semiconductor bulk and the ambient is described.
|
|
|
4378270 |
Method of etching circuit boards and recovering copper from the spent etch solutions
The present invention relates to a method of etching copper with a hydrogen peroxide-sulfuric acid etchant containing an acid soluble phosphonic acid in the manufacture of electronic circuits...
|
|
|
4376057 |
Etchant composition and use thereof
An aqueous acidic composition suitable for etching containing an acid and polyvinyl alcohol and use thereof.
|
|
|
4374744 |
Stripping solution for tin or tin alloys
A stripping solution for tin or tin alloys which comprises an inorganic and/or organic acid, an oxidizing agent and a heterocyclic compound free of a sulfur atom but containing a nitrogen atom in...
|
|
|
4370197 |
Process for etching chrome
An aqueous acidic composition suitable for etching which contains an acid and a thiourea compound, and use thereof.
|
|
|
4370192 |
Apparatus for chemical etching of silicon
Extremely cold gaseous nitrogen is used as a cooling medium in the highly exothermic reaction between a chemical etch solution and silicon. This greatly increases the throughput of silicon material...
|
|
|
4348255 |
Process for the preparation of an optically transparent and electrically conductive film pattern
An optically transparent and electrically conductive film pattern on a substrate, e.g., an electrooptical display plate provided with a patterned transparent electrode layer, is prepared by a...
|
|
|
4347289 |
Use of S-119 in lithographic fountain solutions
Polysaccharide S-119 is used as a desensitizer in lithographic fountain solutions to maintain non-image areas on a lithographic printing plate in a hydrophilic condition in order to prevent...
|
|
|
4345969 |
Metal etch solution and method
A solution is disclosed for the one-step etching of a three layer titanium-nickel-copper metallization. The etch solution comprises about 1.8 to 2.0 moles/liter hydrofluoric acid, about 2.5 to 4.0...
|
|
|
4329475 |
Selected poly(oxyalkylated) 1,3,4-thiadiazoles and their use as corrosion inhibitors
Disclosed are selected poly(oxyalkylated) 1,3,4-thiadiazoles of the formula: ##STR1## wherein each R is individually selected from hydrogen and methyl; and the sum of y and z is from 2 to about 30....
|
|
|
4314876 |
Titanium etching solution
A method of chemically milling metal and particularly for chemically milling titanium and titanium alloys which comprises subjecting these metals to the action of an aqueous acidic medium...
|
|
|
4308091 |
Etching medium and process for the correction of chromed gravure cylinders
An etching medium for chromed surfaces, comprises amounts of aluminum chloride, hydrochloric acid and an inorganic reducing agent, effective for etching a chromed surface. This medium is...
|
|
|
4306933 |
Tin/tin-lead stripping solutions
An improved tin/tin-lead stripping solution and method of preparing and using same, the solution including one or more compounds containing at least one amino (NH 2 ) group, one carboxylic acid...
|
|
|
4305779 |
Method of polishing nickel-base alloys and stainless steels
A chemical attack polish and polishing procedure for use on metal surfaces such as nickel base alloys and stainless steels. The chemical attack polish comprises Fe(NO 3 ) 3 , concentrated CH 3 ...
|
|
|
4302246 |
Solution and method for selectively stripping alloys containing nickel with gold, phosphorous or chromium from stainless steel and related nickel base alloys
Improved solutions are provided for selectively stripping alloys containing nickel with gold, phosphorous or chromium from substrates formed from alloys containing iron with chromium and in some...
|
|
|
4297257 |
Metal stripping composition and method
A composition for stripping solder and tin from a copper substrate having an extended life is provided by the inclusion of a polyacrylamide in a peroxide-fluoride based stripping composition. The...
|
|
|
4289576 |
Method for removing cobalt-containing deposits from surfaces
By this invention there is provided a method for dissolving cobalt (II) and cobalt (III) compounds by contacting said compounds with an aqueous acidic solution comprising a compound containing a...
|
|
|
4283248 |
Etching solution for tin-nickel alloy and process for etching the same
An etching solution containing 0.1 mol/l or more phosphoric acid, 0.05 mol/l or more pyrophosphoric acid, 0.1 mol/l or more phosphorous acid, 0.1 mol/l or more of a mixture of phosphoric,...
|
|
|
4269654 |
Silicon nitride and silicon oxide etchant
An etching solution for etching composite structures of silicon nitride on silicon oxide on silicon substrates which etches the silicon nitride at a rate equal to or faster than the silicon oxide...
|
|
|
4264377 |
Material for treatment of surfaces
A method of treating oxidized surfaces but especially metal surfaces using a mixture by which deep entry of porous rust can be achieved and reduction of the oxidation effected deep within the...
|
|
|
4255231 |
Carpet etching
Multi-level nylon pile fabrics having a selectively etched surface and a process of developing an etched effect that comprises selectively applying a chemical fiber etching agent to the surface of...
|
|
|
4246130 |
Stripping composition and method for metals
A method and composition are disclosed for the stripping of polymer coatings from coated metal surfaces. The composition comprises methylene chloride, formic acid, chlorinated acetic acid and a...
|
|
|
4238279 |
Compositions and methods for treating surface of lithographic printing plates
A liquid composition for treating surface of lithographic printing plates, especially etching liquid and dampening liquid which essentially consists of (a) phosphoric acids, (b) nitric acid or...
|
|
|
4236957 |
Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.Y --H.sub.2 O.sub. -mercapto containing heterocyclic nitrogen etchant
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a heterocyclic nitrogen compound containing at least one...
|
|
|
4230522 |
PNAF Etchant for aluminum and silicon
A chemical etchant and a process for chemically etching thin films of aluminum, silicon, and aluminum-silicon alloy on composite structures which may be, for example, integrated circuit devices....
|
|
|
4227963 |
Chemical etching of polymers for metallizing utilizing an aqueous sulfuric-carboxylic acid etchant
The surfaces of polymer articles are conditioned for metallizing by treatment with an etching solution composed of a mixture of sulfuric acid and a carboxylic acid, such as formic or acetic acid.
|
|
|
4225350 |
Non-chromate conversion coatings
Improved color, brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treatment with a non-toxic solution comprised of sulfuric acid, hydrogen...
|
|
|
4225351 |
Non-chromate conversion coatings
Improved brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treatment with a non-toxic solution comprised of sulfuric acid, hydrogen peroxide, a...
|
|
|
4222779 |
Non-chromate conversion coatings
Improved brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treatment with a non-toxic solution comprised of sulfuric acid, hydrogen peroxide and a...
|
|
|
4191561 |
Method for the production of trialuminum nickelide fibers
A process for the production of trialuminum nickelide fibers which involves the utilization of an oxalic acid-hydrogen chloride mixture for separating the fibers from a solid, two-phase, composite...
|
|
|
4180469 |
Dithiocarbamate sulfonium salt inhibitor composition
Compositions comprising mixtures of a dithiocarbamic acid derivative and a sulfonium compound such as triphenylsulfonium chloride provide effective corrosion inhibition in acid treatment of metal...
|
|
|
4174253 |
Dissolution of metals utilizing a H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 solution catalyzed with hydroxy substituted cycloparaffins
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and an effective amount of a mono- or dihydroxy-substituted cycloparaffin.
|
|
|
4160691 |
Etch process for chromium
Chromium/copper/chromium conductor lines and glass-chromium cermet resistor structures are formed on a substrate by a subtractive etch process in which undercutting of the top chromium layer and...
|
|
|
4158592 |
Dissolution of metals utilizing a H.sub.2 O.sub.2 -sulfuric acid solution catalyzed with ketone compounds
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and an effective amount of a ketone soluble in the solution.
|
|
|
4158593 |
Dissolution of metals utilizing a H.sub.2 O.sub.2 -sulfuric acid solution catalyzed with selenium compounds
Clean etchings at high rates are obtained using a solution containing sulfuric acid, hydrogen peroxide, a catalytic amount of a selenium compound of a +4 oxidation state and a secondary or tertiary...
|
|
|
4154877 |
Electroless deposition of gold
A method for depositing electroless nickel on aluminum or aluminum alloy is described. The method is particularly useful for fabricating bonding pads on aluminum metallized semiconductor devices...
|
|
|
4144119 |
Etchant and process
This invention is directed to an etchant and to a process for its use. The etchant comprises sulfuric acid activated with hydrogen peroxide or the synergistic combination of hydrogen peroxide and...
|
|
|
4141850 |
Dissolution of metals
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and certain primary diols.
|
|
|
4140646 |
Dissolution of metals with a selenium catalyzed H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 etchant containing t-butyl hydroperoxide
Clean etchings at high rates are obtained using a solution containing sulfuric acid, hydrogen peroxide, a catalytic amount of a selenium compound of a +4 oxidation state and t-butyl hydroperoxide.
|
|
|
4134746 |
Method of strengthening glass articles
This invention is directed to a process for strengthening glass articles and, in particular, glass containers such as beer bottles. The invention is directed to a process whereby the article is...
|