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A conductive ink composition for screen printing contains a conductive metal particle (A) having an oleic acid surfactant, a non-chlorine-based resin composition (B), and an organic solvent (C), wherein the conductive metal particle (A) is contained in an amount of 45 to 70% by weight with respect to the total ink composition, the non-chlorine-based resin composition (B) has a number average molecular weight of 50,000 or more and is contained in an amount of 5 to 15% by weight with respect to the total ink composition, the organic solvent (C) has a flash point of 75 to 110° C. and is contained in an amount of 25 to 50% by weight with respect to the total ink composition, and the ink composition has an ink viscosity of 10 to 25 Pa·s (23° C.) at a shear rate of 100 s−1.

Titel:	Highly electrically conductive silver ink composition and wiring obtained using same
Autor/in / Beteiligte Person:	Corporation, DIC
Link:	View record in USPTO Patent Grants (Volltext)
Veröffentlichung:	2024
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Grants Sprachen: English Patent Number: 11939,482 Publication Date: March 26, 2024 Appl. No: 17/058233 Application Filed: August 30, 2018 Assignees: DIC CORPORATION (Tokyo, JP) Claim: 1. A conductive ink composition for screen printing, comprising a conductive metal particle (A) having an oleic acid surfactant, a non-chlorine-based resin composition (B), and an organic solvent (C), wherein the conductive metal particle (A) has an amount of free oleic acid of 100 to 350 ppm and is contained in an amount of 45 to 70% by weight with respect to the total ink composition, the non-chlorine-based resin composition (B) has a number average molecular weight of 50,000 or more and is contained in an amount of 5 to 15% by weight with respect to the total ink composition, the organic solvent (C) has a flash point of 75 to 110° C. and is contained in an amount of 25 to 50% by weight with respect to the total ink composition, and the ink composition has an ink viscosity of 10 to 25 Pa·s (23° C.) at a shear rate of 100 s −1 . Claim: 2. The conductive ink composition for screen printing according to claim 1 , wherein the conductive metal particle (A) has a shape of a flake, a median diameter of 1 to 8 μm, a specific surface area of 1.0 to 2.0 m 2 /g, and a tap density of 1.5 to 4.0 g/cm 3 . Claim: 3. A method for producing wiring, comprising, a wiring forming step of printing the conductive ink composition according to claim 1 on a substrate to form wiring, and a drying step of drying the wiring. Claim: 4. The method for producing wiring according to claim 3 , wherein the drying step is conducted at a drying temperature of 150° C. or lower and for a drying time of 30 minutes or less. Claim: 5. A wiring, which is formed by using the conductive ink composition for screen printing according to claim 1 . Patent References Cited: 20100127223 May 2010 Dorfman ; 20140326929 November 2014 Hsueh et al. ; 2012-509965 April 2012 ; 2012-89252 May 2012 ; 2012-089252 August 2012 ; 2014-220238 November 2014 ; 101085487 November 2011 ; 2014/141741 September 2014 Other References: International Search Report dated Oct. 2, 2018, issued in counterpart International Application No. PCT/JP2018/032099 (2 pages). cited by applicant Assistant Examiner: Bowman, Andrew J Primary Examiner: Yuan, Dah-Wei D. Attorney, Agent or Firm: WHDA, LLP

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Highly electrically conductive silver ink composition and wiring obtained using same