Title:
BACK GRINDING TAPE
Document Type and Number:
WIPO Patent Application WO/2021/044833
Kind Code:
A1
Abstract:
A back grinding tape having a sheet-shaped substrate and an adhesive agent layer formed on one surface of the substrate, wherein the adhesive agent layer comprises a cured product of an adhesive agent composition and is 50-500 μm thick, the adhesive agent composition includes a polyurethane (A), a (meth)acrylate monomer (B), a chain transfer agent (C), a photopolymerization initiator (D), and 0.4-6 mass% of an ionic liquid (E), and the polyurethane (A) includes a polyurethane (a1) having a skeleton that includes a structure derived from a polyoxyalkylene polyol and a structure derived from a polyisocyanate, and having (meth)acryloyl groups at a plurality of ends.
Inventors:
IKEYA TATSUHIRO (JP)
NAKANISHI KENICHI (JP)
NAKANISHI KENICHI (JP)
Application Number:
PCT/JP2020/030939
Publication Date:
March 11, 2021
Filing Date:
August 17, 2020
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
C09J11/06; C09J7/38; C09J175/04; H01L21/304
Domestic Patent References:
| WO2012077726A1 | 2012-06-14 | |||
| WO2019069746A1 | 2019-04-11 |
Attorney, Agent or Firm:
OIKAWA Shu et al. (JP)
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