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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10233337 B1

PDFFull Text
Date of Patent:
Mar. 19, 2019

Filed:

Feb. 22, 2013

Charge-transporting varnish

Applicant:

Nissan Chemical Industries, Ltd., Tokyo, JP;

Inventors:

Kayo Takeda, Funabashi, JP;

Takuji Yoshimoto, Funabashi, JP;

Assignee:

NISSAN CHEMICAL INDUSTRIES, LTD., Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Khanh T Nguyen

Int. Cl.
CPC ...
C09D 5/24 (2006.01); H01L 51/00 (2006.01); C09D 179/02 (2006.01); C08G 73/02 (2006.01); C09D 4/00 (2006.01); C09D 7/20 (2018.01); H01L 51/50 (2006.01);
U.S. Cl.
CPC ...
C09D 5/24 (2013.01); C08G 73/0266 (2013.01); C09D 4/00 (2013.01); C09D 7/20 (2018.01); C09D 179/02 (2013.01); H01L 51/0007 (2013.01); H01L 51/0059 (2013.01); H01L 51/5056 (2013.01); H01L 51/5088 (2013.01);
Abstract

A charge-transporting thin film having excellent flatness can be obtained with good repeatability using the charge-transporting varnish of the present invention, which contains: a charge transportation substance comprising a charge-transporting monomer or a charge-transporting oligomer or polymer having a number-average molecular weight of 200-50,000, or a charge transporting material comprising the charge transportation substance and a dopant substance; and a mixed solvent including at least one type of good solvent and at least one type of poor solvent; the absolute value of the boiling point difference ΔT° C. of the good solvent and the poor solvent satisfying the relation |ΔT|<20° C.; the viscosity at 25° C. being 7.5 mPa·s or less; the surface tension at 23° C. being 30.0-40.0 mN/m; and the charge-transporting material being dissolved or uniformly dispersed in the mixed solvent.

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