Sacrificial compositions, methods of use thereof, and methods of decomposition thereof

1. A sacrificial composition of matter that decomposes to form air-regions, the sacrificial composition comprising:

a sacrificial polymer that undergoes acid-catalyzed decomposition, wherein the sacrificial polymer is chosen from polypropylene carbonate (PPC), polyethylene carbonate (PEC), polycyclohexane carbonate (PCC), polycyclohexanepropylene carbonate (PCPC), polynorbomene carbonate (PNC), a copolymer of polynorbomene and polynorbomene carbonate, and combinations thereof; and

a catalytic amount of a photoacid generator, wherein the photoacid generator is chosen from a nucleophilic halogenide, a complex metal halide anion, and combinations thereof.

2. The composition of matter of claim 1 , wherein the composition decomposes at a temperature range from about 100 to 120 C.

3. The composition of matter of claim 1 , wherein the composition decomposes at a temperature range from about 175 to 200 C.

4. The composition of matter of claim 1 , wherein the composition decomposes at a temperature range from about 100 to 120 C. and leaves substantially no solid residue either from the polymer or the photoacid generator (PAG).

5. The composition of matter of claim 1 , wherein the composition decomposes at a temperature range from about 100 to 120 C. after exposure to ultraviolet (UV) radiation.

6. The composition of matter of claim 1 , wherein the composition acts as an adhesive.

7. The composition of matter of claim 1 , wherein the composition is a positive tone sacrificial material.

8. The composition of matter of claim 1 , wherein the photoacid generator is chosen from a diphenyliodononium salt, a triphenylsulfononium salt, a diphenyifluoronium salt, and combinations thereof.

9. The composition of matter of claim 1 , wherein the photoacid generator is chosen from tetrakis(pentafluorophenyl)borate-4-methylphenyl [4-(1-methylethyl)phenyl] iodonium (DPI-TPFPB), tris(4-t-butylphenyl)sulfonium tetrakis-(pentafluorophenyl)borate (TTBPS-TPFPB), tris(4-t-butylphenyl)sulfonium hexafluorophosphate (TTBPS-HFP), triphenylsulfonium triflate (TPS-Tf), bis(4-tert-butylphenyl)iodonium triflate (DTBPI-Tf), triazine (TAZ-101), triphenylsulfonium hexafluoroantimonate (TPS-103), triphenylsulfonium bis(perfluoromethanesulfonyl) imide (TPS-N 1), di-(p-t-butyl) phenyliodonium bis(perfluoromethanesulfonyl) imide (DTBPI-N 1), triphenylsulfonium tris(perfluoromethanesulfonyl) methide (TPS-C1), di-(p-t-butylphenyl) iodonium, tris(perfluoromethanesulfonyl)methide (DTBPI-C1), and combinations thereof.

10. The composition of claim 1 , wherein the sacrificial polymer is about 1 to 50% by weight percent of the composition, and wherein the photoacid generator is from about 0.5 to 5% by weight of the composition.