Multilayer body
There is provided a laminate in which a decrease in the release function of a release layer can be suppressed even when the laminate is heat-treated under either temperature condition of low temperature and high temperature. This laminate includes a carrier; an adhesion layer on the carrier and containing a metal M 1 having a negative standard electrode potential; a release-assisting layer on a surface of the adhesion layer opposite to the carrier and containing a metal M 2 (M 2 is a metal other than an alkali metal and an alkaline earth metal); a release layer on a surface of the release-assisting layer opposite to the adhesion layer; and a metal layer on a surface of the release layer opposite to the release-assisting layer, and T 2 /T 1 , a ratio of a thickness of the release-assisting layer, T 2 , to a thickness of the adhesion layer, T 1 , is more than 1 and 20 or less.
1. A laminate comprising:
a carrier;
an adhesion layer provided on the carrier and comprising titanium;
a release-assisting layer provided on a surface of the adhesion layer opposite to the carrier and comprising copper;
a release layer provided on a surface of the release-assisting layer opposite to the adhesion layer and comprising amorphous carbon; and
a metal layer provided on a surface of the release layer opposite to the release-assisting layer,
wherein T 2 /T 1 , a ratio of a thickness of the release-assisting layer, T 2 , to a thickness of the adhesion layer, T 1 , is 1.5 or more and 6.7 or less.
2. The laminate according to claim 1 , wherein when a thermal history of pressing at a pressure of 30 kgf/cm 2 under any temperature condition of 240° C. or more and 340° C. or less for 2 hours is given to the laminate, a release strength between the release layer and the release-assisting layer measured in accordance with JIS C6481-1996 is 1 gf/cm or more and less than 100 gf/cm.
3. The laminate according to claim 1 , wherein the carrier is composed of glass or ceramic.