Dip Coating Foil Holder
Original Publication Date: 1988-Mar-01
Included in the Prior Art Database: 2005-Feb-14
When a sheetmetal workpiece is dipped into a photoresist bath in order to coat both sides of the workpiece, the normal resulting coating is thinner at the top of the workpiece than at the bottom. This leads to non-uniform images after photoprocessing. To overcome this problem, a holder 12 is suspended on a rectangular frame 10. Two hooks 11 are connected to either side of frame 10 to allow the frame and holder to be dipped into a photoresist bath. Holder 12 is rectangular and is slotted along its lower edge allowing a workpiece 13 to be inserted therein. (Image Omitted) In operation, the holder 12 and workpiece 13 are dipped into a photoresist bath until the level thereof reaches line 14. That is, the upper surface of the bath lies generally along line 14 which extends across holder 12 near the top thereof.