First, the outer single-end impedance calculation model
H1: Media thickness ER1: Dielectric constant W1: impedance line bottom width w2: impedance line top width T1: finished copper thickness C1: Silk welding thickness of substrate C2: Welding thickness on the copper or traverse CER: Bar welding Dielectric constant
This impedance calculation model is suitable for single-end impedance calculation after outer line printing welding.
Second, outer differential impedance calculation model
H1: Media thickness ER1: Dielectric constant W1: impedance line bottom width w2: impedance line top width S1: impedance line spacing T1: finished copper thickness C1: Silk welding thickness of substrate C2: Copper or wound Thickness C3: Welding thickness in the substrate CER: dielectric constant of solder welding
This impedance calculation model applies to: differential impedance calculation after outer line printing welding.
Third, the outer single-end impedance coplanar calculation model
H1: Media thickness ER1: Dielectric constant W1: impedance line bottom width w2: impedance line top width D1: impedance line to surrounding T1: finished copper thickness C1: substrate green oil thickness C2: copper skin or walk Online green oil thickness CER: dielectric constant of green oil
This impedance calculation model is suitable for: single-ended coplanar impedance calculation after outer line printing welding.
Fourth, outer differential impedance coplanar calculation model
H1: Media thickness ER1: Dielectric constant W1: impedance line bottom width w2: impedance line top width D1: impedance line to two copper skin T1: finished copper thickness C1: base material green oil thickness C2: copper skin or walk Online green oil thickness C3: Green oil thickness of the substrate CER: Green oil dielectric constant
This impedance calculation model applies to: differential coplanar resistance calculation after outer line printing welding.
V. Inner-layer single-end impedance calculation model
H1: Media thickness ER1: Dielectric constant H2: Medium thickness ER2: dielectric constant W1: impedance line bottom width W2: impedance line top width T1: finished copper thickness
This impedance calculation model is suitable for: single-ended impedance calculation of inner layer lines.
Sixth, inner layer differential impedance calculation model
H1: Media thickness ER1: dielectric constant H2: Medium thickness ER2: dielectric constant W1: impedance line bottom width W2: impedance line top width S1: impedance line spacing T1: finished copper thickness
This impedance calculation model is suitable for: inner line differential impedance calculation.
7. Inner-layer single-end impedance coplanar calculation model
H1: Media thickness ER1: H1 correspondence medium dielectric constant H2: Medium thickness ER2: H2 correspondence dielectric layer dielectric constant W1: impedance line bottom width W2: impedance line top width D1: impedance line to the surrounding copper edge T1: Line copper thickness
This impedance calculation model is suitable for: inner layer single-ended coplanar impedance calculation.
8. Inner layer differential impedance coplanar calculation model
H1: Media thickness H2: Medium thickness W1: impedance line bottom width W2: impedance line top width S1: impedance line spacing D1: impedance line to surrounding T1: Line copper thick ER1: H1 correspondence medium dielectric constant ER2 : H2 correspondence medium layer dielectric constant
This impedance calculation model is suitable for: inner layer differential coplanarization calculation. Read the full article, original title: Summarize several kinds of impedance calculation models in PCB design
Article Source: [Micro Signal: GH_EB821DD72E77, WeChat public number: PCB Design and Learning] Welcome to add attention! Please indicate the source of the article.
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