Methods for producing in-situ grooves in chemical mechanical planarization (CMP) pads, and novel CMP pad designs

Methods for producing in-situ grooves in CMP pads are provided. In general, the methods for producing in-situ grooves comprise the steps of patterning a silicone lining, placing the silicone lining in, or on, a mold, adding CMP pad material to the silicone lining, and allowing the CMP pad to solidif...

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Bibliographische Detailangaben
Hauptverfasser:	ROY PRADIP K, VAIDYA HEM M, DEOPURA MANISH
Format:	Patent
Sprache:	eng
Schlagworte:	ADDITIVE MANUFACTURING TECHNOLOGY ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING DRESSING OR CONDITIONING OF ABRADING SURFACES FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GRINDING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING PERFORMING OPERATIONS POLISHING SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TOOLS FOR GRINDING, BUFFING, OR SHARPENING TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Methods for producing in-situ grooves in CMP pads are provided. In general, the methods for producing in-situ grooves comprise the steps of patterning a silicone lining, placing the silicone lining in, or on, a mold, adding CMP pad material to the silicone lining, and allowing the CMP pad to solidify. CMP pads comprising novel groove designs are also described. For example, described here are CMP pads comprising concentric circular grooves and axially curved grooves, reverse logarithmic grooves, overlapping circular grooves, lassajous grooves, double spiral grooves, and multiple overlapping axially curved grooves. The CMP pads may be made from polyurethane, and the grooves produced therein may be made by a method from the group consisting of silicone lining, laser writing, water jet cutting, 3-D printing, thermoforming, vacuum forming, micro-contact printing, hot stamping, and mixtures thereof.