Substrate laminated body and method of manufacturing substrate laminated body

A body, comprising stacked substrates, wherein:

• a first substrate,
• an adhesion layer, and
• a second substrate,
• are layered in this order,
• the adhesion layer has a thickness of from 0.1 nm to 5000 nm, and
• the body, comprising stacked substrates, has a tensile bonding strength of 5 MPa or more.

A method of manufacturing a body comprising stacked substrates, the method comprising:

• a first step of forming, on a first substrate, a film comprising a compound (A), which has a cationic functional group containing at least one of a primary nitrogen atom or a secondary nitrogen atom and which has a weight average molecular weight of from 90 to 400,000;
• a second step of providing, on the film, a cross-linking agent (B), which has three or more —C(═O)OX groups in a molecule, in which from one to six of the three or more —C(═O)OX groups are —C(═O)OH groups and which has a weight average molecular weight of from 200 to 600, X being a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms;
• a third step of layering a second substrate on a surface on which a film comprising the compound (A) and the cross-linking agent (B) is formed;
• and
• a heating step of heating the film comprising the compound (A) and the cross-linking agent (B) to a temperature of from 70° C. to 450° C., thereby forming an adhesion layer comprising a reaction product of the compound (A) and the cross-linking agent (B),
• wherein the compound (A) comprises at least one selected from the group consisting of an aliphatic amine having a weight average molecular weight of from 10,000 to 400,000 and a compound having a siloxane bond (Si—O bond) and an amino group and having a weight average molecular weight of from 130 to 10,000.

A method of manufacturing a body comprising stacked substrates, the method comprising:

• a fifth step of forming, on a first substrate, a film comprising a compound (A), which has a cationic functional group containing at least one of a primary nitrogen atom or a secondary nitrogen atom and which has a weight average molecular weight of from 90 to 400,000, and a cross-linking agent (B), which has three or more —C(═O)OX groups in a molecule, in which from one to six of the three or more —C(═O)OX groups are —C(═O)OH groups and which has a weight average molecular weight of from 200 to 600, X being a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms;
• a sixth step of layering a second substrate on a surface at which the film including the compound (A) and the cross-linking agent (B) is formed;
• and
• a heating step of heating the film comprising the compound (A) and the cross-linking agent (B) to a temperature of from 70° C. to 450° C., thereby forming an adhesion layer comprising a reaction product of the compound (A) and the cross-linking agent (B),
• wherein the compound (A) comprises at least one selected from the group consisting of an aliphatic amine having a weight average molecular weight of from 10,000 to 400,000 and a compound having a siloxane bond (Si—O bond) and an amino group and having a weight average molecular weight of from 130 to 10,000.