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May 2019

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Subject:
Re: IPC-7525A Aperture size in the stencil
From:
Wayne Thayer <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Wayne Thayer <[log in to unmask]>
Date:
Sun, 19 May 2019 21:37:20 -0700
Content-Type:
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Hi Elizabeth-

Surprised not to see answers to your question.

I always try to make the "window panes" comparable in size to the adjacent
apertures for pads.

Wayne Thayer

On Mon, May 6, 2019 at 12:00 PM Elizabeth Bustamante <[log in to unmask]>
wrote:

> IPC-7525A states: "The apertures for the Heat Sink/Ground Plane should be
> reduced from 50% to 80% of the area of the ground plane. This can be
> accomplished by window paning the apertures as shown in Figure 3-10"
>
> My question is what's the actual aperture widths and aperture lengths?
>
> I'd really appreciate your help.
> Thanks for your time,
> Elizabeth
>

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