Burn-in & Test Socket Workshop - BiTS Workshop
Burn-in & Test Socket Workshop - BiTS Workshop
Burn-in & Test Socket Workshop - BiTS Workshop
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Load Board Effects<br />
▼ Loss tangent affects <strong>in</strong>sertion loss more at higher<br />
frequencies<br />
▼ Uniformity of ε r and loss tangent vs. frequency<br />
▼ Substrate thickness affects <strong>in</strong>ductance to ground<br />
▼ Increased frequency means th<strong>in</strong>ner substrates<br />
▼ Substrate thickness and dielectric constant (ε r ),<br />
along with l<strong>in</strong>e width, are major parameters <strong>in</strong><br />
controll<strong>in</strong>g impedance<br />
▼ Plat<strong>in</strong>g thickness has the biggest effect on load<br />
board life<br />
5
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