Sintering materials and attachment methods using same

A method for attachment, comprising:

• applying a film of metal particles to a polymeric, glass, metal, paper, or ceramic substrate, wherein applying the film comprises casting the film;
• drying the film on the polymeric, glass, metal, paper, or ceramic substrate;
• transferring the dried film by a lamination process at a temperature of from about 50 to about 175° C. and a pressure of from about 0.05 to about 3 MPa directly from the polymeric, glass, metal, paper, or ceramic substrate to a substrate which will subsequently receive one or more components comprising a die, wherein the dried film is in contact with the polymeric, glass, metal, paper, or ceramic substrate during lamination to the substrate which will subsequently receive said one or more components;
• placing said one or more components on the transferred film to form an assembly;
• applying a pressure of from about 0.5 MPa to about 20 MPa to the assembly;
• and
• sintering the assembly at a temperature of about 175 to about 400° C. for about 0.25 seconds to about 30 minutes;
• wherein the film comprises a composition comprising:
• a metal powder having a d50 range of 0.001 to 10 micrometers, the metal powder comprising 30 to 95 wt. % of the composition;
• and
• a binder having a softening point between about 90° C. and 170° C., the binder comprising 0.1 to 0.8 wt. % of the composition;
• wherein the composition has a viscosity of from about 10 to about 200,000 cP.