PCB設計

パッド上の表面実装コネクタを強化するためにビアを使用するのは良い習慣ですか、それとも悪い習慣ですか?

There are some reasons for putting a via in the pad, but strengthening a connector is a new practice for me.

The weakest part of an SMD pad is that the copper could delaminate from the fiberglass, and lift off the PCB itself. Anything you could do to prevent that would help, including making the pad larger or putting a via in the pad itself.

But you have to be careful since putting a via in the pad can cause other issues.

  • The first problem is that it might make the pads not flat enough, so a connector pin won’t make good contact with the pad and thus not get soldered well.
  • The second issue is that the solder could get wicked down the via and leave nothing left for the connector pin. This isn’t a big issue if you are hand soldering, but can be a problem when doing it with automation.

Honestly, if connector strength is an issue, then it is advisable to seriously consider going to a through-hole connector or some type of connector, which gets strength from some other ways. Such as a connector that gets bolted to the chassis itself (and stress on the PCB is minimal).

続きを読む: SMTアセンブリ

#PCB 設計 #PCB アセンブリ

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オリバーは、PCB 設計に熟練した経験豊富なエレクトロニクス エンジニアです。, アナログ回路, 組み込みシステム, とプロトタイピング. 彼の深い知識は概略図のキャプチャに及びます, ファームウェアコーディング, シミュレーション, レイアウト, テスト, そしてトラブルシューティング. オリバーは、電気設計の才能と機械の適性を活かして、プロジェクトをコンセプトから量産まで進めることに優れています。.

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