Some guys maybe contact the dome array first time, so they don’t know how to assemble the dome array on the circuit board. Now, please follow the below steps:
1). The dome array is supported by the protective paper, the paper will throw away when assembling.
2). Peel the transparent film with metal domes from the protective paper by forceps or other toolings.
3). Keep the adhesive side stick to the PCB, press a little time to make the metal dome array assemble firmly.
Please see the picture:
Now, I think you are clear about assembling instruction of dome array. If you need any further information, please contact us.