Peter

If you wish to be really pedantic, how about LCTE, as opposed to VCTE (I
learnt both of these at school, about 60 years ago)? You may think the
volume coefficient is the cube of the linear, but 'tis not, necessarily.
In amorphous molecular structures, it usually is, but it is rarely the
case in morphous ones, as X, Y and Z LCTEs are rarely the same (take
FR-4 as one example).

Brian

Dave Hillman wrote:
>
> Hi folks! I have ran into a problem which has me baffled and the extra 20
> ounces of Coke I consumed this morning didn't bring about any better
> thought clarity so I would like to bounce the problem off the minds of
> TechNet. I have been attempting to hand solder a chip resistor (50 x 100)
> but have immediate cracking of the resistor across the width of the
> component. The resistor is either Aluminum Nitride or BeO (I'm still trying
> to find out which material). And yes, we are using proper soldering
> technique(s) and the resistor pad geometries are our standard dimensions. I
> know that the typical resistor body material is Alumina. Has anyone had
> good or bad experiences in hand soldering AlN or BeO resistors? Have I run
> into a material flexural strength issue?
>
> Dave Hillman
> Rockwell Collins
> [log in to unmask]
>
> ---------------------------------------------------------------------------------
> Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
> To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
> information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
> ---------------------------------------------------------------------------------

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------