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Crystal, Side & Heel fillets

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RandyB View Drop Down
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    Posted: 13 Jun 2014 at 1:21pm
The default heel and side environment settings for Crystals produce unusually wide side fillets and a minimal heel fillet.   This does not seem consistent with other part types.   Normally the side fillet is minimal and heel fillet is more robust.   Why is the the crystal so different?  Is there perhaps a problem with the default environment settings for crystals?
 
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Tom H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jun 2014 at 1:30pm

Crystals use the same lead form solder joint rules as the Aluminum Electrolytic Capacitor.

Compare the mfr. recommended pattern with the IPC calculations to see if they're close.

2 Pin parts have the luxury of not having pins side by side so the pad width can be larger.

90% of the Crystal component solder joint is under the package and cannot be visually inspected.

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