| Patents for C23F 1 - Etching metallic material by chemical means (16,062) |
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| 05/08/1991 | DE3936363A1 Etching unit esp. for printed copper circuit boards - in which used rinsing water is distilled to recover pure water and ammoniacal etchant to which ammonia is added prior to recycling |
| 05/07/1991 | US5013399 Method of preparing support for lithographic printing plate |
| 05/07/1991 | US5013395 Oxidizing a cuprous chloride solution to cupric chloride |
| 05/02/1991 | WO1991005888A1 Etching installation and process for etching objects |
| 05/02/1991 | EP0425437A2 Method for making metallic patterns |
| 05/02/1991 | EP0425012A1 Baths and process for chemical polishing of copper and copper alloy surfaces |
| 04/30/1991 | US5010951 Graded-groove heat pipe |
| 04/27/1991 | CA2028386A1 Method for making metallic patterns |
| 04/25/1991 | DE3935222A1 Aetzanlage sowie verfahren zum aetzen von gegenstaenden Etching system and method for etching of Objects |
| 04/25/1991 | CA2028195A1 Baths and process for the chemical polishing of copper or copper alloy surfaces |
| 04/24/1991 | EP0424340A2 A method for pickling iron and steel surfaces |
| 04/24/1991 | EP0424105A2 Method of fabricating a contact device |
| 04/24/1991 | CN1050833A Method for treating articles by liquid and their apparatus |
| 04/23/1991 | US5009725 Fluxing agents comprising β-diketone and β-ketoimine ligands and a process for using the same |
| 04/23/1991 | US5009722 Process for producing base material for an aluminum offset printing plate |
| 04/23/1991 | US5009714 Oxidation of copper using gaseous oxygen, dissolving copper oxide with a solution of gaseous oxygen, ammonia and an inorganic ammonium salt |
| 04/23/1991 | CA1283381C Hollow cathode enhanced plasma for high rate reactive ion etching and deposition |
| 04/20/1991 | CA2027294A1 Method for pickling iron and steel surfaces |
| 04/18/1991 | WO1991005079A1 Hydrogen peroxide solutions |
| 04/16/1991 | US5007984 Coating with a metal film, forming patterned resist over film, etching to produce tapered shape |
| 04/16/1991 | US5007968 Process and apparatus for treating articles of substantial thickness |
| 04/16/1991 | US5007445 Dynamic flood conveyor with weir |
| 04/10/1991 | EP0421262A2 Method of treating objects with a fluid and apparatus for realising this method |
| 04/09/1991 | US5006202 Fabricating method for silicon devices using a two step silicon etching process |
| 04/03/1991 | EP0323467B1 Installation for surface treatment of continuous-flow strip, in particular degreasing installation |
| 04/02/1991 | US5004672 Electrophoretic method for applying photoresist to three dimensional circuit board substrate |
| 04/02/1991 | US5004521 Etchant effective on thin metal film but not on protective coating over it |
| 03/31/1991 | CA2026517A1 Method of processing board-like objects, for example, printed circuit boards |
| 03/26/1991 | US5002627 Spray etching apparatus with automatic individually controllable etching jets |
| 03/20/1991 | CN1012071B Etching solutions containing fluorinated cycloalkane sulfonate surfactand additives |
| 03/13/1991 | EP0416939A2 Method of producing a core for magnetic head |
| 03/13/1991 | EP0416938A2 Method of producing a core for magnetic head |
| 03/13/1991 | EP0416775A1 Apparatus and method for single side spray processing of printed circuit boards |
| 03/13/1991 | EP0416126A1 Sulfuric acid composition having low surface tension |
| 03/12/1991 | US4999083 Method of etching crystalline material with etchant injection inlet |
| 03/12/1991 | US4999079 Process and apparatus for treating articles and preventing their wrap around a roller |
| 03/06/1991 | EP0415807A2 Acidic cleaning process for metal products containing titanium or a chemical element of the titanium family |
| 03/06/1991 | EP0414969A1 Method of producing a core for magnetic head |
| 03/06/1991 | CN1049637A Demetallization of metal films |
| 03/06/1991 | CA2014648A1 Apparatus and method for single side spray processing of printed circuit boards |
| 03/05/1991 | US4996939 Apparatus for drying printed circuit boards |
| 02/26/1991 | US4995942 Aqueous ferricyanide ion solution containing soluble molybdate or tungstate and compound forming heteropoly salt |
| 02/21/1991 | WO1991002109A1 Process for the acid-bath pickling of metal products containing titanium or at least one chemical element of the titanium family |
| 02/21/1991 | WO1991001894A1 Inhibited composition and method for stripping tin, lead or tin-lead alloy from copper surfaces |
| 02/20/1991 | EP0413261A2 Process for removing tin and tin-lead alloy from copper substrates |
| 02/20/1991 | EP0413042A1 Method of producing micromechanical sensors for the AFM/STM profilometry and micromechanical AFM/STM sensor head |
| 02/20/1991 | EP0413041A1 Method of producing micromechanical sensors for the AFM/STM profilometry and micromechanical AFM/STM sensor head |
| 02/19/1991 | US4994332 Continuous removal of precipitate |
| 02/12/1991 | US4992138 Method and apparatus for constructing a foil matrix for a solar cell |
| 02/12/1991 | US4992135 Containing oxidizer, forming tungsten oxide which is polished mechanically and dissolved in potassium or ammonium hydroxide in the solution |
| 02/06/1991 | EP0411061A1 Fe-Mn-Al-C ALLOYS AND THEIR TREATMENT. |
| 02/06/1991 | EP0183775B1 Selective nickel stripping compositions and method of stripping |
| 02/05/1991 | US4990395 Electrically conductive copper layers and process for preparing same |
| 02/05/1991 | US4989319 Method of fabricating a graded-groove heat pipe |
| 01/30/1991 | EP0410274A2 Method of forming fine patterns |
| 01/29/1991 | US4989157 Automated chemical milling controller |
| 01/23/1991 | EP0408646A1 Apparatus for processing planar printed circuit boards |
| 01/16/1991 | EP0407951A2 Method for applying a photoresist to a 3-D conductive substrate |
| 01/15/1991 | US4985111 Process and apparatus for intermittent fluid application |
| 01/15/1991 | CA1279104C Lithographic technique using laser for fabrication of electronic components and the like |
| 01/10/1991 | DE3921545A1 Decorative surface pattern |
| 01/09/1991 | EP0407349A2 Electrode for use in electrolytic processes and process for manufacturing it |
| 01/09/1991 | EP0407326A1 Method for electroplating nickel onto titanium alloys |
| 01/09/1991 | EP0406356A1 Installation for etching objects |
| 01/09/1991 | EP0406344A1 Process and installation for etching copper-containing work pieces |
| 01/08/1991 | US4983252 Process for producing printed circuit board |
| 01/02/1991 | EP0405006A2 Process for manufacture of decorative surfaces |
| 01/01/1991 | US4982065 Method of producing a core for magnetic head |
| 12/31/1990 | CA2018670A1 Metal substrate of improved surface morphology |
| 12/27/1990 | WO1990015710A1 Demetallization of metal films |
| 12/25/1990 | US4980032 Two-stage, vacuum; the first first removes low boiling fractions and retard loss of acid by reflux; wate acid from semiconductor processing |
| 12/25/1990 | US4980017 Method for recirculating high-temperature etching solution |
| 12/21/1990 | CA2018242A1 Demetallization of metal films |
| 12/19/1990 | CN1047891A Method of forming graduations, numbers and/or marks on metallic measuring instrument |
| 12/18/1990 | US4978422 Method for improving insulation resistance of printed circuits |
| 12/18/1990 | US4978418 Using ions having different ion energies |
| 12/13/1990 | WO1990015168A1 Electrolytic method for regenerating tin or tin-lead alloy stripping compositions |
| 12/12/1990 | EP0402315A2 A method of making a metallic pattern on a substrate |
| 12/11/1990 | US4976810 Etching electon resists film of chromium or chromium oxide on a substrate |
| 12/07/1990 | CA2018249A1 Method of making a metallic pattern on a substrate |
| 12/05/1990 | CA2009130A1 Method for regenerating tin or tin-lead alloy stripping compositions |
| 12/04/1990 | US4975335 Fe-Mn-Al-C based alloy articles and parts and their treatments |
| 11/28/1990 | EP0399015A1 Installation for etching objects |
| 11/27/1990 | US4973380 Process for etching copper base materials |
| 11/27/1990 | US4973379 Spraying etchant |
| 11/22/1990 | EP0397988A2 Plasma processing with metal mask integration |
| 11/22/1990 | DE3916372A1 Embossed pattern transfer onto metallic platens for laminate prodn. - by precise location of etching resistant material in given pattern by pick=up roll, screen printing and engraving rollers |
| 11/20/1990 | US4971894 Method and structure for preventing wet etchant penetration at the interface between a resist mask and an underlying metal layer |
| 11/20/1990 | CA1276530C Soluble fluorinated cycloalkane sulfonate surfactant additives for nh4f/hf oxide etchant solutions |
| 11/15/1990 | WO1990013443A1 Etchant solution for photoresist-patterned metal layers |
| 11/14/1990 | EP0397327A1 Process for dissolving tin and tin alloys |
| 11/14/1990 | EP0396984A1 Regeneration of spent ferric chloride etchants |
| 11/13/1990 | US4969973 Time profile |
| 11/13/1990 | CA1276128C Method for selectively plating plastics |
| 11/13/1990 | CA1276096C Process and apparatus for chemically treating articles in a contained chamber, with sealed-door access to the chamber |
| 11/07/1990 | EP0396010A2 Method and apparatus for monitoring growth and etch rates of materials |
| 11/06/1990 | US4968361 Method of domain refinement of oriented silicon steel by using flux-printing |
| 11/06/1990 | CA1275871C Diffusion oriented repair process |
| 10/31/1990 | EP0395411A2 Method for making patterned thin film |
| 10/31/1990 | EP0394664A2 Improved semiconductor pressure sensor means and method |