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1 Signal layer(ÐźŲã)
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2 Internal plane layer(ÄÚ²¿µçÔ´/½ÓµØ²ã)
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3 Mechanical layer(»úе²ã)
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4 Solder mask layer(×躸²ã)
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5 Paste mask layer(Îý¸à·À»¤²ã£¬SMDÌùƬ²ã)
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6 Keep out layer(½ûÖ¹²¼Ïß²ã)
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7 Silkscreen layer(˿ӡ²ã)
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8 Multi layer(¶à²ã)
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