This process specification is for manufacture of cantilever spring blades for Advanced LIGO. It includes material requirements, limitations on shaping, detail on the nickel plating process and details of the age hardening fixture. These springs are for use in an Ultra-High Vacuum (UHV) system.
Revision v4:
1)The process specification has been modified and written specifically for vendors.
2) It has been extended to inlclude all cantilever spring blades for Advanced LIGO.