Yes, I did. It is quite time consuming because the hotplate I am using now doesn't have a temperature control system. I turn down the temperature button little by little by myself. But still I heard the noise of glass cracking during the cooling process(I can't see the glass because I have an insulator on top pf the glass). On Fri, Feb 27, 2009 at 12:40 PM, steven.e.staller@delphi.com wrote: > Are you ramping the temperature down to avoid thermal shocking the > bonded pair? -- Jingru