| 摘要 |
PURPOSE:To simplify the forming method of a mounted wiring diagram by drawing a wiring pattern on a film obtained by superposing a mask positive film for the external shape of a parts and codes on a raw film, and under the state removing the positive film, drawing and developing the external shape of the parts and the codes. CONSTITUTION:The mask 11 for the external shape of parts and the codes is drawn in the 1st raw film by a photoplotter in a dark room and developed to form a positive film 12. Said positive film 12 is superposed on the 2nd raw film 13 and then a wiring pattern of a parts mounting surface is drawn on the superposed film by the photoplotter. The external shape 15 of the parts and the codes are drawn on the 2nd undeveloped raw film by the photoplotter. Said pattern- drawn raw film 13 is developed to draw a wiring pattern 16 and the external shape 17 of the parts and form the positive film 18 of the mounted wiring diagram in which drawn lines are not crossed each other. Thus, the process is simplified and the formation is made easy. |
