RoHS states that as well as a PPM threshold, the banned substances must
not be 'intentionally added'
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting
Sent: Wednesday, August 15, 2007 1:03 PM
To: [log in to unmask]
Subject: Re: [TN] Does encapsulation make a part RoHS compliant?
Good point! I'll check.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Burke
Sent: Wednesday, August 15, 2007 12:47 PM
To: [log in to unmask]
Subject: Re: [TN] Does encapsulation make a part RoHS compliant?
Interesting I just looked up some of those parts and sure enough even
though
the plating on the thing is leaded or lead free, the die attach is using
leaded solder BUT the one I looked at is using high melting point solder
(high lead) and thus although not LEAD FREE IS RoHS compliant. The part
that
I looked up had 87.23% lead in the solder which means it is exempt as
the
exemption ruling is:
"Lead in high melting temperature type solders (i.e. lead-based alloys
containing 85 % by weight or more lead)"
Phil are you sure they are not confusing RoHS compliant with "lead
free"??
John
John Burke
(408) 515 4992
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting
Sent: Wednesday, August 15, 2007 7:51 AM
To: [log in to unmask]
Subject: [TN] Does encapsulation make a part RoHS compliant?
Good morning,
We have a component that in the PTH form is RoHS compliant, but the SMT
is not. The manufacturer states that it has to do with thermal
performance of the D2PAK. It has been suggested that if we encapsulated
the part it would become RoHS compliant.
I have two issues with this; 1) difficulty of encapsulating a single
part on a circuit board after reflow assembly and conformal coating does
not count, and 2) I don't believe simply encapsulating the part will
make it comply with the requirements of RoHS.
We would like to avoid redesigning the board for the PTH part.
Am I correct in my assumption that encapsulation does not make a part
RoHS compliant?
Any suggestions for a solution?
Thanks in advance.
Phil Nutting
Design for Manufacturing Engineer
Kaiser Systems, Inc.
126 Sohier Road
Beverly, MA 01915
voice: 978-922-9300 x1310
fax: 978-922-8374
e-mail: [log in to unmask]
www.kaisersystems.com
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