Actions
Forum Thread Details
  • Replies 9 replies
  • Subscribers 176 subscribers
  • Views 777 views
  • Users 0 members are here
Related

oh dear...need bottom & top layer changing....

Former Member

So after putting the finishing touches to my pcb design on a long journey, I'm at the point where I can almost submit to a Chinese fab house ...but I've just found out that most aren't keen (read won't) to do a bottom silk screen....and the way I've done my board, a bottom silkscreen is essential (the silk screen will aid installation for those not familair with the pcb) - now as it goes, I don't need a top silkscreen, so I'm thinking that really I would like to  simply call my bottom layer the top layer & my top layer the bottom layer.

 

My new top layer (old bottom layer), can then have a silkscreen...in theory, it ought to be simply.

 

Now I've seen some ulps that swap layers, but frankly my brain starts hurting at what cvould go wrong (for example drill holes being drille din the wrong location) ...I've also read of some folks  'mapping' the eagle layers in the cam jpb to their own layers of choice....I feel comfortable doing neither.

 

Which is the least worst way of proceeding here?!!

Parents

  • It seems to me you could simply rename the gerber files so they stack up in

    the reverse order. Remembering to change your notes to the board house.

     

    If it's a multi layer board watch out for the drills of vias that dont go

    from top to bottom.

     

    HTH

    Warren

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

  • in reply to autodeskguest

    On 07/31/2013 09:03 PM, Warren Brayshaw wrote:

    It seems to me you could simply rename the gerber files so they stack up in

    the reverse order. Remembering to change your notes to the board house.

     

    That will only work if you insert your components from the same side.

    Not only that but the lettering on the silk screen would be mirrored.

     

    But I'd checkout other board houses.  We generally use Advanced

    Circuits, 4pcb.com.

     

        - Chuck

     

  • in reply to dukepro

    Chuck Huber wrote on Fri, 02 August 2013 01:30

    On 07/31/2013 09:03 PM, Warren Brayshaw wrote:

    It seems to me you could simply rename the gerber files so they

    stack up in

    the reverse order. Remembering to change your notes to the board

    house.

     

    That will only work if you insert your components from the same side.

    Not only that but the lettering on the silk screen would be mirrored.

     

    But I'd checkout other board houses.  We generally use Advanced

    Circuits, 4pcb.com.

     

        - Chuck

     

     

    The OP wanted to call the bottom, top and top, bottom. so the factory sees

    bottom silk as top silk. Phyically the board was not changed

    Gerbers are top down view. It's the board house that applies the required

    mirroring for a layer. It has to be this way. Think of layer 2 of 4. The

    litho for layer 2 needs to be different depending on the board stack up ie

    Laminate/prepreg/laminiate or Prepreg/laminate/prepreg

     

    HTH

    Warren

     

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

Reply
  • in reply to dukepro

    Chuck Huber wrote on Fri, 02 August 2013 01:30

    On 07/31/2013 09:03 PM, Warren Brayshaw wrote:

    It seems to me you could simply rename the gerber files so they

    stack up in

    the reverse order. Remembering to change your notes to the board

    house.

     

    That will only work if you insert your components from the same side.

    Not only that but the lettering on the silk screen would be mirrored.

     

    But I'd checkout other board houses.  We generally use Advanced

    Circuits, 4pcb.com.

     

        - Chuck

     

     

    The OP wanted to call the bottom, top and top, bottom. so the factory sees

    bottom silk as top silk. Phyically the board was not changed

    Gerbers are top down view. It's the board house that applies the required

    mirroring for a layer. It has to be this way. Think of layer 2 of 4. The

    litho for layer 2 needs to be different depending on the board stack up ie

    Laminate/prepreg/laminiate or Prepreg/laminate/prepreg

     

    HTH

    Warren

     

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

Children
No Data