I want to deposit gold to form arrays on top of my ITO glass substrate that is spin coated with three layers, namely;TiO2, Perovskite and Spiro-OMeTAD layers. The problem, I don't have have deposition mask to control the pattern of gold to be deposited. can I use aluminum foil to make deposition mask with a special designed pattern for deposition. Is it won't melt during the deposition process in the sputter coater or contaiminate my samples.