To All -

I am currently working on the design of a PWB that must continuously
function (read as IPC-D-275 class 3) at ambient temperatures as high as
105 degrees C.  I am seeking input as to design criteria for this
environment.

The items I have already identified include:

200 degree C Tg FR-4/Gtek base material
Conformal leaded parts where ever available
No fine line / fine pitch design
Teardrop at all drilled pads including vias

My primary question is should we be using a "NO LEAD" finish and solder
for these boards?
Is there any thing I have overlooked?

TIA
Jeffrey McGlaughlin
[log in to unmask]
Battelle Memorial Institute
Columbus Ohio

################################################################
DesignerCouncil E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE DesignerCouncil <your full name>
To unsubscribe:   SIGNOFF DesignerCouncil 
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################