What happened to the old .047" thickness??
Bernie Kessler
At 07:19 AM 02/13/2004 -0500, you wrote:
>Okay... let me rephrase my question. What would be the most common
>laminate thicknesses for double-sided FR-4 material, around the .045" range.
>I know that I can get .031 and .062 material, is there anything in between
>that would be considered "standard" (readily available without added cost)?
>
>Jim Marsico
>Senior Engineer
>Production Engineering
>EDO Electronics Systems Group
>[log in to unmask] <mailto:[log in to unmask]>
>631-595-5879
>
>
> -----Original Message-----
> From: Scott B. Westheimer [SMTP:[log in to unmask]]
> Sent: Thursday, February 12, 2004 7:33 PM
> To: [log in to unmask]
> Subject: Re: [TN] FR-4 standard thickness
>
> 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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