Multi-material membrane for vat polymerization printer

A method for manufacturing a multi-material membrane, the method comprising:

• bonding a first fluorinated ethylene propylene (FEP) or polyolefin polymer film to a first side of a radiation-transparent flexible substrate;
• and
• bonding a second FEP or polyolefin polymer film to a second side of the radiation-transparent flexible substrate.

A membrane assembly for a three-dimensional printing system, the membrane assembly comprising:

• a radiation-transparent flexible membrane comprising (i) a radiation-transparent flexible substrate with a first and a second side, (ii) a first fluorinated ethylene propylene (FEP) or polyolefin polymer film bonded to the first side of the radiation-transparent flexible substrate, and (iii) a second FEP or polyolefin polymer film bonded to the second side of the radiation-transparent flexible substrate;
• and
• a frame affixed to a perimeter of the radiation-transparent flexible membrane and configured to stretch the radiation-transparent flexible membrane along a first plane.