Hi Zhang., You can carry out lithography to pattern Psoitve PR. Then metallization and then lift off to get the partial metallization. Do you find any prob with this method???? Regards Bala. > On 10/14/06, Huaibin Zhangwrote: > > > Wow, it is a challenging task. Good thing is that > 1mm x 1mm is not too hard to handle. I have few > questions want to know: (1) how many cavities do you > need to make? > > (2) What is the relative position of the two side > walls? Do they have to be in the opposite side?