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# c12) United States Patent Enomoto 

# (54) REAGENT FOR ENHANCING GENERATION OF CHEMICAL SPECIES 

(71) Applicant: TOYO GOSEI CO., LTD., Ichikawa-shi, Chiba (JP) 

(72) Inventor: Satoshi Enomoto, Ichikawa (JP) 

(73) Assignees: Toyo Gosei Co., Ltd., Ichikawa-Shi, Chiba (JP); Osaka University, Suita-Shi, Osaka (JP) 

( *) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by O days. 

(21) Appl. No.: 14/909,051 

(22) PCT Filed: Aug. 7, 2014 

(86) PCT No.: PCT/JP2014/004119 § 371 (c)(l), (2) Date: Jan.29, 2016 

(87) PCT Pub. No.: WO2015/019616 

PCT Pub. Date: Feb. 12, 2015 

## (65) Prior Publication Data 

US 2016/0187773 Al Jun. 30, 2016 

(60) Provisional application No. 61/863,354, filed on Aug. 7, 2013. 

(51) Int. Cl. 

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## Related U.S. Application Data 

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# (IO) Patent No.: US 10,031,416 B2 

# (45) Date of Patent: Jul. 24, 2018 

(52) U.S. Cl. CPC .......... G03F 710045 (2013.01); C08F 220128 (2013.01); G03F 710397 (2013.01); G03F 71203 (2013.01); G03F 712022 (2013.01); C08F 2220/283 (2013.01) 

(58) Field of Classification Search None See application file for complete search history. 

## (56) References Cited 

<img src='content_image/890257.jpg'>

Thevenet et al. "An efficient photoinduced deprotection of aromatic acetals and ketals", Helvet. Chim. Acta., vol. 94 pp. 331-346 (2011).* 

Primary Examiner - Martin J Angebranndt 

(74) Attorney, Agent, or Firm - TraskBritt, P.C. 

## (57) ABSTRACT 

A reagent that enhances acid generation of a photoacid generator and composition containing such reagent is dis› closed. 

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US010031416B2 

## U.S. PATENT DOCUMENTS 

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## FOREIGN PATENT DOCUMENTS 

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## OTHER PUBLICATIONS 

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## 19 Claims, 1 Drawing Sheet 

