FPC / PCB 工程計算機

銅厚換算計算器：1oz 轉 um

將 PCB / FPC 銅厚在 oz、um、mil、mm 之間換算，包含 1oz 轉 um、base copper 與 plated copper。

銅厚換算計算器怎麼用

銅厚換算是 FPC / PCB 疊構、電鍍與線寬電流估算的基礎。這個工具把 copper weight 與實際厚度放在同一頁，方便工程師快速確認 base copper、plated copper 與總銅厚。

Copper thickness conversion is a foundation step for stack-up review, plating planning and trace current estimates. Use this page to convert copper weight into microns, mils and millimeters, including common 1 oz to um checks.

Copper weight to thickness

公式: Copper thickness (um) = Copper weight (oz) x 34.79 + plated copper (um)

  • Copper weight: base copper foil weight in oz/ft2.
  • Plated copper: additional copper deposited by plating.
  • Total copper: base copper plus plated copper.

公式依據

  • Formula basis: standard copper mass-per-area conversion using copper density; 1 oz/ft2 is commonly treated as about 34.79 um, so the 1 oz to um conversion is shown explicitly.
  • Engineering note: measured finished copper should be confirmed with the PCB / FPC manufacturer when plating or current capacity is critical.

範例

0.5 oz base copper with 18 um plated copper gives about 35.4 um total copper.

輸入欄位

  • Base copper weight
  • Plated copper thickness

結果輸出

  • Total copper in um
  • Total copper in mil
  • Total copper in mm

工程注意事項

  • FPC flex areas often use thinner RA copper for bend performance.
  • Finished copper should include plating where current capacity or etching result is reviewed.
  • Factory reports may use nominal copper weight, measured copper thickness, or finished copper thickness. Keep the term consistent.

驗證檢查

  • Stack-up total thickness
  • Trace current capacity
  • Etching compensation
  • Plating specification

相關製程站

  • 材料選擇 - PI / PET / FR-4 thickness, RA or ED copper, adhesive type, coverlay thickness
  • 疊構設計 - Total thickness, dielectric spacing, symmetry, controlled impedance
  • 電鍍 - Current density, copper thickness, throwing power, plating area loading

相關計算器

FAQ

Is 1 oz copper exactly 35 um?

It is commonly rounded to 35 um. This calculator uses 34.79 um as the engineering conversion basis.

Should plated copper be added for FPC?

Yes, when the conductor receives copper plating and the finished copper thickness affects current, resistance, etching or hole reliability.