OK
-----Original Message-----
From: L-Soft list server at IPC (1.8c) <[log in to unmask]>
To: Richard Haynes <[log in to unmask]>
Date: Wednesday, October 14, 1998 10:27 PM
Subject: TechNet: confirmation required (75C57F)
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>From: "Richard Haynes" <[log in to unmask]>
>To: "TechNet E-Mail Forum." <[log in to unmask]>
>Subject: Fw: TechNet: confirmation required (37743C)
>Date: Wed, 14 Oct 1998 22:24:29 -0400
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>-----Original Message-----
>From: L-Soft list server at IPC (1.8c) <[log in to unmask]>
>To: Richard Haynes <[log in to unmask]>
>Date: Wednesday, October 14, 1998 10:19 PM
>Subject: TechNet: confirmation required (37743C)
>
>
>>The TechNet list has been configured to request explicit confirmation of
>all
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>>------------------ Original message (ID=37743C) (200
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>>Message-ID: <023001bdf7e1$d3b998a0$1802e0c7@default>
>>From: "Richard Haynes" <[log in to unmask]>
>>To: "TechNet E-Mail Forum." <[log in to unmask]>
>>Subject: Fw: TechNet: confirmation required (5C92B1)
>>Date: Wed, 14 Oct 1998 22:16:28 -0400
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>>OK
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>>
>>-----Original Message-----
>>From: L-Soft list server at IPC (1.8c) <[log in to unmask]>
>>To: Richard Haynes <[log in to unmask]>
>>Date: Wednesday, October 14, 1998 9:40 PM
>>Subject: TechNet: confirmation required (5C92B1)
>>
>>
>>>The TechNet list has been configured to request explicit confirmation of
>>all
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>>that
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reply
>>to
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>>>
>>>------------------ Original message (ID=5C92B1) (148
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1998
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>>>Message-ID: <022101bdf7dc$41d84440$1802e0c7@default>
>>>From: "Richard Haynes" <[log in to unmask]>
>>>To: "TechNet E-Mail Forum." <[log in to unmask]>
>>>Subject: Fw: TechNet: confirmation required (095B98)
>>>Date: Wed, 14 Oct 1998 21:36:38 -0400
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>>>
>>>-----Original Message-----
>>>From: L-Soft list server at IPC (1.8c) <[log in to unmask]>
>>>To: Richard Haynes <[log in to unmask]>
>>>Date: Wednesday, October 14, 1998 9:30 PM
>>>Subject: TechNet: confirmation required (095B98)
>>>
>>>
>>>>The TechNet list has been configured to request explicit confirmation
of
>>>all
>>>>messages posted to the list, for security reasons. You must now confirm
>>>that
>>>>the message enclosed below did originate from you. To do so, simply
>reply
>>>to
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>>>>message. If this does not work, or if the message did NOT originate from
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>>>>
>>>>------------------ Original message (ID=095B98) (97
>>>lines) --------------------
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(EDT)
>>>>Message-ID: <01e601bdf7da$e20a50e0$1802e0c7@default>
>>>>From: "Richard Haynes" <[log in to unmask]>
>>>>To: "TechNet E-Mail Forum." <[log in to unmask]>, <[log in to unmask]>
>>>>Subject: Re: Re: [TN] Autoclaving Flex PWBs
>>>>Date: Wed, 14 Oct 1998 21:26:46 -0400
>>>>MIME-Version: 1.0
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>>>>
>>>>Andy,
>>>>Thanks for your responds. Do you know the UL numbers for this tests. Cu
>>>>corrosion products can be, depending on the time, %RH and presence of
>>other
>>>>anions and metals, Cu2O, Cu(OH)2 or CuO2.
>>>>Thanks again.
>>>>Richard
>>>>
>>>>-----Original Message-----
>>>>From: Andy Magee <[log in to unmask]>
>>>>To: [log in to unmask] <[log in to unmask]>
>>>>Date: Wednesday, October 14, 1998 8:50 PM
>>>>Subject: Re: [TN] Autoclaving Flex PWBs
>>>>
>>>>
>>>>>Richard,
>>>>>
>>>>>UL uses simple recirculating ovens to conduct the aging so %RH is
>>>>uncontrolled.
>>>>>
>>>>>Your question is very perceptive of the underlying physics. One of
>>several
>>>>>mechanisms that can degrade (or enhance) the bond strength during this
>>>test
>>>>is
>>>>>corrosion buildup on the copper, and that will vary with humidity.
Which
>>>>failure
>>>>>mechanism is going to control the thermal aging performance depends on
>>the
>>>>test
>>>>>conditions (time, temp, RH), sample configuration (SL, ML, line width),
>>>and
>>>>>material types (dielectric, copper, adhesive).
>>>>>
>>>>>Andy Magee
>>>>>Flex Guru
>>>>>[log in to unmask]
>>>>>
>>>>>Richard Haynes wrote:
>>>>>
>>>>>> Andy,
>>>>>> Is there a %RH that goes along with the UL accelerated test? It is
>>>>>> probability "well known" but they are so many that leave out the
>>>>important
>>>>>> variabiles.
>>>>>> Thanks
>>>>>> Richard
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Andy Magee <[log in to unmask]>
>>>>>> To: [log in to unmask] <[log in to unmask]>
>>>>>> Date: Tuesday, September 29, 1998 4:58 PM
>>>>>> Subject: Re: [TN] Autoclaving Flex PWBs
>>>>>>
>>>>>> >Eric,
>>>>>> >
>>>>>> >Underwriters Laboratories has a thermal index (10 and 56 day
>>>>>> >accelerated tests) that provides a maximum continuous operating
>>>>>> >temperature rating for flex materials. The majority of rated
>materials
>>>>>> >on the market are limited to 105C. There are a few choices rated in
>>>the
>>>>>> >150-160C range, so you do have the option of specifying something
>like
>>>>>> >125C performance.
>>>>>>
>>>>>
>>>>><snip>
>>>>>
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