1 电路图形制作1.1 引子在工业发展史上我们听到多少次这样的叹息:“我曾经拥有过它!”然而一项伟大的发明创造总是超前于时代,它又被人们抛弃了多少次?由于印制电路工业的产品形形色色,制造工艺纷繁复杂,“曾经拥有过它”的内涵特别丰富。假定把过去发明的一些可行的印制板制造技术保存下来,经过我们的筛选、整理,并在此发表,希 1 circuit diagram 1.1 primer In the history of industrial development, we heard how many times such a sigh: “I have had it!” However, a great invention always ahead of the times, it has been abandoned many times? As Printed circuit industry products of all shapes and colors, complicated manufacturing process, “once had it” is particularly rich connotation. Assuming that some of the viable PCB manufacturing techniques invented in the past are preserved, filtered, collated, and published here