| Patents for C23F 1 - Etching metallic material by chemical means (16,062) |
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| 12/31/1991 | US5076885 Using copper tetramine complex |
| 12/24/1991 | US5074972 Surface treatment of ti or ti alloy parts for enhancing adhesion to organic material |
| 12/18/1991 | EP0461289A1 Apparatus for treating three-dimensional workpieces with a liquid |
| 12/17/1991 | US5073478 Method of making a pattern |
| 12/17/1991 | US5073233 Electrodeposited resin film, hardening agent |
| 12/17/1991 | US5073232 Diluting with anhydrous inert gas, dry treatment, corrosion resistance |
| 12/11/1991 | EP0460786A1 Pretreatment composition and process for tin-lead immersion plating |
| 12/10/1991 | US5071508 Circuit boards; uniformity |
| 12/10/1991 | US5071486 Process for removing protective coatings and bonding layers from metal parts |
| 12/05/1991 | DE4017728A1 Three=dimensional etcher - has cannula to deliver fresh etching fluid to the workpiece surface |
| 12/05/1991 | CA2035578A1 Pretreatment composition and process for tin/lead plating |
| 12/04/1991 | CN1015010B Rapid and deep chemical etching on roller (rolling wheel) and steel mould |
| 11/28/1991 | WO1991018412A1 Process and device for monitoring and controlling etching operations |
| 11/27/1991 | EP0458119A1 Process and apparatus for separating copper, in particular from cupric chloride etching solutions |
| 11/27/1991 | EP0457859A1 Hydrogen peroxide solutions. |
| 11/21/1991 | EP0457253A2 Cantilever stylus for use in an atomic force microscope and method of making same |
| 11/21/1991 | DE4016211A1 Verfahren zur ueberwachung und steuerung eines aetzvorgangs und vorrichtung hierfuer Method for monitoring and controlling of etching and device for here |
| 11/21/1991 | DE3618769C1 Apparatus for the continuous electrolytic regeneration of an at least partially exhausted acidic iron(III) chloride solution used for etching metals |
| 11/19/1991 | US5066360 Using resist as protective covering for metallized appertures so they are not destroyed during etching of circuit board pattern |
| 11/13/1991 | EP0456162A2 Engineered textures for all stands and stages of rolling |
| 11/12/1991 | US5063951 Fluid treatment device |
| 11/12/1991 | US5063653 Method of producing a core for a magnetic head |
| 11/06/1991 | EP0455574A1 Near neutral pH etching solution for molybdenum or tungsten and method for using it |
| 10/31/1991 | WO1991016473A1 Method of processing rod |
| 10/31/1991 | WO1991014019A3 Process and device for regenerating alkaline solutions for pickling aluminium |
| 10/30/1991 | EP0453786A2 Convection transfer system |
| 10/23/1991 | CN1014433B Sheets of aluminium alloy containing magnesium suitable for producing bodies of cans by drawing and ironing, and method of obtaining said sheets |
| 10/22/1991 | US5059454 Method for making patterned thin film |
| 10/22/1991 | US5059279 Susceptor for microwave heating |
| 10/22/1991 | US5059278 Selective chemical removal of coil seed-layer in thin film head magnetic transducer |
| 10/15/1991 | US5057401 Using photosensitivity photoresists |
| 10/15/1991 | US5056552 High temperature recirculating chemical bath construction |
| 10/15/1991 | CA1290672C Thin-film releasing apparatus |
| 10/09/1991 | EP0449887A1 Masking compositions and method for applying the same |
| 10/08/1991 | US5054519 Recirculating chemical bath with inflow and self balancing outflow |
| 10/03/1991 | WO1991014801A1 Device for the electrolytic regeneration of an etching agent containing metal, especially copper |
| 10/03/1991 | WO1991014800A1 Device for the electrolytic regeneration of an etching agent containing chloride and metallic ions |
| 10/03/1991 | WO1991014584A1 Method for improving the insulation resistance of printed circuits |
| 10/02/1991 | EP0449022A2 Method of controlling photoresist film thickness and stability of an electrodeposition bath |
| 10/02/1991 | EP0448870A1 System and process for etching with, and regenerating, alkaline ammoniacal etchant solution |
| 10/02/1991 | DE4010035A1 Vorrichtung zur elektrolytischen regeneration eines chlorid- und metallionen enthaltenden aetzmittels Apparatus for electrolytic regeneration of a chloride and metal ion-containing etching agent |
| 10/02/1991 | DE4010034A1 Vorrichtung zur elektrolytischen regeneration eines metallhaltigen, insbesondere kupferhaltigen, aetzmittels Apparatus for the electrolytic regeneration of a metal-containing, in particular copper-containing, etching agent |
| 10/01/1991 | US5053318 Coating substrate with photoresist, electroless plating of catalyst, exposure to radiation, development |
| 10/01/1991 | CA2034370A1 Process for identification evaluation and removal of microshrinkage |
| 09/24/1991 | US5051379 Coating an inorganic material on a wafer, masking for a beam pattern photoresists |
| 09/24/1991 | US5051146 Apparatus for fabricating a graded-groove heat pipe |
| 09/22/1991 | CA2029444A1 System and process for etching with and regenerating, alkaline ammoniacal etchant solution |
| 09/19/1991 | WO1991014019A2 Process and device for regenerating alkaline solutions for pickling aluminium |
| 09/19/1991 | DE4008379A1 Verfahren und anlage zum regenerieren von alkalihaltigen aluminiumbeizloesungen Method and system for regeneration of alkaline aluminiumbeizloesungen |
| 09/18/1991 | EP0447268A1 An etching process |
| 09/17/1991 | US5050063 Method for controlling the characteristics of an aqueous solution |
| 09/17/1991 | US5049234 Water, hydrofluoric acid, nitric acid |
| 09/17/1991 | US5049233 Recovery of sodium hydroxide and aluminum hydroxide from etching waste |
| 09/17/1991 | CA1289006C Computer aided printer-etcher |
| 09/11/1991 | EP0445820A1 Process for making a needle with a three-dimensionally tapered point |
| 09/11/1991 | EP0445209A1 Use of a metal starting material comprising a substance for controlling the etching factor in photo etching |
| 09/10/1991 | US5047128 Electrodialysis cell for removal of excess electrolytes formed during electrodeposition of photoresists coatings |
| 09/04/1991 | EP0444714A1 Holder device for processing disc-like articles |
| 09/04/1991 | EP0444359A2 Dynamic flood conveyor with weir |
| 08/27/1991 | US5043201 Thin layer of an alkali resistant material overlying a web |
| 08/22/1991 | WO1991012706A1 Making and testing an integrated circuit using high density probe points |
| 08/21/1991 | EP0442775A1 Pickling process for steel materials, in particular stainless steel |
| 08/21/1991 | EP0442250A2 Control method with redox-potential |
| 08/20/1991 | US5041229 Aerosol jet etching |
| 08/20/1991 | US5041191 Diffusion barrier for thin film hybrid circuits |
| 08/20/1991 | US5041189 Accurate track width formed by laser etching on ferrite and ferromagnetic iron-silica-aluminum alloy, in alkali metal hydroxide aqueous solution with aluminate ion generating additive |
| 08/14/1991 | EP0441308A2 Process for preparing printed circuit board having through-hole |
| 08/09/1991 | CA2035847A1 Method for pickling or cleaning materials of steel, in particular stainless steel |
| 08/08/1991 | WO1991011544A1 Method and device for regeneration of iron chloride solution for pickling of copper |
| 08/06/1991 | US5037504 Transferring the image |
| 07/30/1991 | US5035778 Regeneration of spent ferric chloride etchants |
| 07/30/1991 | US5035769 Potassium nitrate and hydroxide |
| 07/30/1991 | US5035765 Installation for etching objects |
| 07/30/1991 | US5035749 Process for removing tin and tin-lead alloy from copper substrates |
| 07/23/1991 | US5034093 Mineral acid, ethylene glycol and an oxidizer for etching metals |
| 07/23/1991 | CA1286548C Etching of vacuum metallized indium |
| 07/17/1991 | EP0436812A1 Copper etch process and printed circuit formed thereby |
| 07/16/1991 | US5032218 Purification, distillation, condensation |
| 07/16/1991 | US5032204 Electrolysis |
| 07/09/1991 | US5030373 Surface-treating agents for copper and copper alloy |
| 07/09/1991 | US5030320 Spraying water to react by-product; air pollution control |
| 06/27/1991 | WO1991008914A1 Copper etching solution and method |
| 06/27/1991 | WO1991008863A1 Methods of preparation of surfaces and applications thereof |
| 06/26/1991 | EP0434434A1 Fountain etch system |
| 06/26/1991 | CN1052571A Permanent-magnetic circuit structure uniformly adjustable in large area for dry technology |
| 06/25/1991 | US5025547 Method of providing textures on material by rolling |
| 06/19/1991 | EP0432223A1 Electrolytic method for regenerating tin or tin-lead alloy stripping compositions |
| 06/12/1991 | EP0431701A2 A method for forming a photoresist with a cover coat |
| 06/11/1991 | US5022949 Variable volume etching machine |
| 06/11/1991 | CA1284763C Composition and method for metal surface refinement |
| 06/05/1991 | CA2031395A1 Method for forming a photoresist with a cover coat |
| 06/04/1991 | US5021120 Using ultrasonically vibrated etchant bath |
| 05/28/1991 | US5019930 Negative-pressure type magnetic head slider, and method of producing the same |
| 05/28/1991 | US5019205 Apparatus for wet etching of thin films |
| 05/28/1991 | US5019161 Process for stripping plated plastic materials |
| 05/22/1991 | EP0427923A2 Method for the reduction of pinholes in resist films |
| 05/21/1991 | US5017460 Etching Perforations In Metal Sheet Via Application Of A Photosensitive Material |
| 05/21/1991 | US5017271 Method for printed circuit board pattern making using selectively etchable metal layers |
| 05/21/1991 | US5017267 Alkanesulfonic acid, ferric nitrate, chlorate |
| 05/14/1991 | US5015322 Tank arrangement particularly designed for chemical milling operations |