you mean this? you have to go to your device MFG to get the accurate info... https://www.cirrus.com/en/pubs/appNote/AN315REV1.pdf > Fellow TechNetters: > > Perhaps the third time is the charm: > > Is there any data out there regarding the integrity of a Thermal Header > Solder Attachment/Bottom Termination Component solder joint integrity > over time. Most BTC that I have x-rayed exhibit some degree of > voiding. Can the solder joint voiding degrade the solder connection > to a point that it would result in a shorted device internally due to > heat build. Is a solder joint a considered a Thermal Insulator? > > Victor, > > From: Hernandez, Victor G > Sent: Monday, January 16, 2017 3:15 PM > To: TechNet E-Mail Forum <[log in to unmask]> > Cc: Hernandez, Victor G <[log in to unmask]> > Subject: FW: IPC Standard, Thermal Header Solder Attachment Devices, or > Bottom Termination Components > > Fellow TechNetters: > > My original post last week did not generate any feedback. Therefore, > I post again in hope of reaching more audience the beginning of the > week. The holidays are over with and the serious work begins. > > Victor, > > From: Hernandez, Victor G > Sent: Thursday, January 12, 2017 7:46 AM > To: 'TechNet E-Mail Forum' <[log in to unmask]<mailto:[log in to unmask]>> > Cc: Hernandez, Victor G > <[log in to unmask]<mailto:[log in to unmask]>> > Subject: IPC Standard, Thermal Header Attachment Devices, THAD > > Fellow TechNetters: > > Is there any data out there regarding the integrity of a Thermal > Header Solder Attachment/Bottom Termination Component solder joint > integrity over time. Most BTC that I have x-rayed exhibit some > degree of voiding. Can the solder joint voiding degrade the solder > connector to a point that it would result in a shorted device > internally. Is a solder joint a Thermal Insulator? > > Victor, >