Hi KennyB,
No ófficial IPC sub-Classes, just my assessment from experience.
How many minuses do you want to add¿
Werner



-----Original Message-----
From: Ken Bloomquist <[log in to unmask]>
To: [log in to unmask]
Sent: Thu, Nov 19, 2009 4:54 pm
Subject: Re: [TN] Discussion on the reliability of single-sided PCB & PCBA


Hi Werner,
I was unaware that IPC had sub-classes. If this material is "-1" then what
ould it be if soldered with lead-free solder?
KennyB
----Original Message-----
rom: Werner Engelmaier [mailto:[log in to unmask]] 
ent: Thursday, November 19, 2009 8:00 AM
o: [log in to unmask]
ubject: Re: [TN] Discussion on the reliability of single-sided PCB & PCBA
Hi Charming,
hat you have is a PCB made of CEM-1 or -2 with unsupported holes---this is
lass -1(minus 1) not Class 2.
hile this might work for some applications, you cannot claim that you have
 Class 2 product; and in harsh environments you clearly will have problems.
erner
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