Look at the Td spec on the laminate data sheet............ go look at
the laminate mfrs websites - Isola - Polyclad etc all have data there on
this with recommendations.........
Regards,
Chris
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Victor G.
Hernandez
Sent: 17 February 2005 15:07
To: [log in to unmask]
Subject: Re: [LF] RoHS compliance PCB
How can the decomposition temperature of a finish PCB/PWB is determine.
There must be some laminate analysis to extract this value and/or
constituent.
Victor,
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Smith, Rick
Sent: Thursday, February 17, 2005 8:38 AM
To: [log in to unmask]
Subject: Re: [LF] RoHS compliance PCB
Ken,
Check with your process guys. I have found increasing laminate
decomposition temperature to above 330 C is required, and moving to 170
Tg laminate is unnecessary and a cost adder with respect to 4/8 layer
computer boards.
Laminates with Tg 145, 150 survive LF BGA rework provided the
decomposition temperature is >330 C.
Anyone else working on laminates have input?? Please coment.
thanks
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Ken Patel
Sent: Wednesday, February 16, 2005 5:06 PM
To: [log in to unmask]
Subject: [LF] RoHS compliance PCB
All,
I have heard that Fab Houses are moving directly to Halogenfree process,
skipping middle step knowing that Halogenfree is next in line to be
implemented. As our current fabs are built using laminate made of Tg of
170
C or more with Nickel Gold surface finish, do you see any problem?
Do we have to worry besides updating the fab notes asking for RoHS
compliance? We expect fab house to build products based on impedance
requirement. Any comments, suggestion?
Re,
Ken Patel
------------------------------------------------------------------------
-------Leadfee Mail List provided as a 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 Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks
send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
------------------------------------------------------------------------
-------
------------------------------------------------------------------------
-------Leadfee Mail List provided as a 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 Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks
send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
------------------------------------------------------------------------
-------
------------------------------------------------------------------------
-------Leadfee Mail List provided as a 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 Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks
send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
------------------------------------------------------------------------
-------
-----------------------------------------
This message (including any attachments) may contain confidential
information intended for a specific individual and purpose. If you are not
the intended recipient, delete this message. If you are not the intended
recipient, disclosing, copying, distributing, or taking any action based on
this message is strictly prohibited.
-------------------------------------------------------------------------------Leadfee Mail List provided as a 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 Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-------------------------------------------------------------------------------
|
