<a href="http://www.haotiantape.com">KEY TAPE</a> is a leading manufacturer in China with products widely applied in electronic products, could ask them for help.
Currently clear<a href="http://www.haotiantape.com/index.php?m=content&c=index&a=lists&catid=53">Double Sided PET Tape</a> is mostly products applied in sealing mobile phone frame, and there's a trend to use OCA, which has no backing material, to help minimize mobile phone thickness