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February 2004

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Subject:
From:
Motoyo Wajima <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 13 Feb 2004 10:20:51 +0900
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Hi $B!! (BScott $B!* (B
I $B!! (Bagree with you.

Motoyo Wajima,
Airex.Inc.,Japan

>Roger,
>
>"Standard" means different things to different people. IPC does not specify
>standard thickness for double sided or multilayer PCB's, that is left up to
>the product designer to meet their product  fit, form and functions needs.
>What is normally considered is material availability as a industry standard.
>Certainly 0.062" thickness, in a lot of cases is used for double sided and
>boards are designed around that thickness. However some designs and products
>can not be that thick and therefore other material needs to be used.
>
>Scott Westheimer
>
>Colonial Circuits
>----- Original Message -----
>From: "Roger Stoops" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Thursday, February 12, 2004 5:18 PM
>Subject: Re: [TN] FR-4 standard thickness
>
>
>Okay, I have a "newbie" type of question:
>
>What are the "standard" thicknesses for double-sided boards?
>
>And then the type of questions I ask when it's been a rough week:
>
>Who determines the standard?  Has IPC determined a standard?
>
>I would like to know so I can tuck it away in my quickly growing files of
>pcb flotsam and jetsam...
>
>Have a good one! (Time to call it a day)
>
>Roger M. Stoops, CID+
>Trimble Navigation Ltd., Dayton, OH, USA
>Ph: +01 937.245.5288
>Fax: +01 937.233.7511
>
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]]On Behalf Of Scott B. Westheimer
>Sent: Thursday, February 12, 2004 3:48 PM
>To: [log in to unmask]
>Subject: Re: [TN] FR-4 standard thickness
>
>
>James,
>
>This is not a standard thickness if you are taking about a double sided PCB.
>However if it is a multilayer and depending on how many layers it has it is
>possible to get your required thickness. Most likely if you are talking
>double sided than it will either be specially made by a laminate
>manufacturer or the PCB fabricator. If the laminator makes it, it might be
>expensive depending on the quantity needed.. It might be best to allow the
>fabricator to make the material as it should cost less.
>
>Scott Westheimer
>
>Colonial Circuits
>----- Original Message -----
>From: "Marsico, James" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Thursday, February 12, 2004 3:04 PM
>Subject: [TN] FR-4 standard thickness
>
>
>> Good day Technet:
>> Our designers are designing a PWB using IPC 4101/24 (FR406) material
>that's
>> .045" thick.  Is this a standard thickness that is readily available?
>>
>> Jim Marsico
>> Senior Engineer
>> Production Engineering
>> EDO Electronics Systems Group
>> [log in to unmask] <mailto:[log in to unmask]>
>> 631-595-5879
>>
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