Hi Werner, How does the Tg relate to the temperature range? This seems to imply that the delta between extremes changes. How does this effect the number of cycles required to emulate the life? Thanks, Rich. Werner Engelmaier <[log in to unmask]> on 07/07/99 12:49:54 PM Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to [log in to unmask] To: [log in to unmask] cc: (bcc: Richard G Wenda/ES/HSC/HUGHES) Subject: Re: [TN] [LF] "Drop-In" Replacement In a message dated 7/7/99 9:35:30, [log in to unmask] writes: >Hi, Werner, >What tests are sufficient to ensure "reasonable" reliability [of solder joints]? >Carol Hi Carol , This sure is a loaded question, and can not be answered by a brief statement without being flip