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Single layer boards

labrat7

Has anyone done anything with single layer flexible cirtuit boards?

I am having trouble finding out how to define the cross section for only one layer. The layout cross section window says I can't delete either the TOP layer or the BOTTOM layer.

The board I am designing has pads on both sides of a single layer of conductive material.

Any help would be appreciated.

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  • Okay, silly me! I thought I was emailing directly to you two and attached a bitmap so you could see my problem. I guess you didn't get those...

    I have a 0.5" square at each end of a 7 inch flexible circuit board. Assuming 0,0 is on the lower left corner, about an inch to the right of the first o.5" pad is a pair of 0.1" wide by 0.4" high pads, the left one connected to the half inch pad to its left and the right one connected to the left pad a second set of pods. The right pad on this second set of pads is connected to the 0.5" pad on the righ side of the board. I am using 0.5" wide copper pours to connect this together.

    Since the Polyimide material acts as both the board material and the soldermask, I need the soldermask on the end pads to be on the bottom while the pads in the top.

    I have tried to draw the polyimide material, with the cutouts in the polyimide material below. The P's represent the polyimide material. The spaces represent gaps in the material and the C's lines represent the copper pours.

    PPPPPPPPP   PPPPPP   PPPPPP   PPPPPPP   PPPPPPPPPPPPPPPPPPPPPPPPPP
     CCCCCCCCCC    CCCCCCCCCCCC     CCCCCCCCCCCCCCCCCCCCCCCC
    PPP     PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP    PPP

    Does this make any sense?
Reply
  • Okay, silly me! I thought I was emailing directly to you two and attached a bitmap so you could see my problem. I guess you didn't get those...

    I have a 0.5" square at each end of a 7 inch flexible circuit board. Assuming 0,0 is on the lower left corner, about an inch to the right of the first o.5" pad is a pair of 0.1" wide by 0.4" high pads, the left one connected to the half inch pad to its left and the right one connected to the left pad a second set of pods. The right pad on this second set of pads is connected to the 0.5" pad on the righ side of the board. I am using 0.5" wide copper pours to connect this together.

    Since the Polyimide material acts as both the board material and the soldermask, I need the soldermask on the end pads to be on the bottom while the pads in the top.

    I have tried to draw the polyimide material, with the cutouts in the polyimide material below. The P's represent the polyimide material. The spaces represent gaps in the material and the C's lines represent the copper pours.

    PPPPPPPPP   PPPPPP   PPPPPP   PPPPPPP   PPPPPPPPPPPPPPPPPPPPPPPPPP
     CCCCCCCCCC    CCCCCCCCCCCC     CCCCCCCCCCCCCCCCCCCCCCCC
    PPP     PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP    PPP

    Does this make any sense?
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