6.4 Strip, etch, strip
The dry film is stripped, the now-unprotected unwanted copper is etched away (the wanted copper is protected by tin), and finally the tin is chemically removed to reveal the finished outer-layer circuitry.
The dry film is stripped, the now-unprotected unwanted copper is etched away (the wanted copper is protected by tin), and finally the tin is chemically removed to reveal the finished outer-layer circuitry.
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