Cheol HAM

Cheol HAM from Suwon-si KR has applied for patents in technology areas such as [[:Category:NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams ; desurfacing by applying flames ; working of metal by electro-erosion ; producing decorative effects by removing surface material, e.g. by engraving, by etching, ; electrolytic etching or polishing ); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS AND AT LEAST ONE PROCESS COVERED BY SUBCLASS OR OR CLASS|NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams ; desurfacing by applying flames ; working of metal by electro-erosion ; producing decorative effects by removing surface material, e.g. by engraving, by etching, ; electrolytic etching or polishing ); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS AND AT LEAST ONE PROCESS COVERED BY SUBCLASS OR OR CLASS]] with Samsung Electronics Co., Ltd..

Patents

• ETCHING COMPOSITION, METHOD OF ETCHING METAL-CONTAINING LAYER USING THE SAME AND METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE USING THE SAME (20250215575)

[[Category:NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams ; desurfacing by applying flames ; working of metal by electro-erosion ; producing decorative effects by removing surface material, e.g. by engraving, by etching, ; electrolytic etching or polishing ); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS AND AT LEAST ONE PROCESS COVERED BY SUBCLASS OR OR CLASS]]