How to place topside pad over a bottomside pad

Brian Taylor schrieb:

I need to make a new component for an Optek OP124 pill pack diode.  This is

a tiny bullet shaped package designed to be placed in a hole drilled between

the top and bottom sides.  Tthe top side is anode, the bottom side is

cathode.  There must be no plating in the hole.

 

I can place an SMD pad on the bottom layer and another SMD pad on the top

layer.  I can then place a hole of 1.8mm diameter through the pair of pads.

If I place the pads exactly over one another I cannot name the pads.  If  I

displace them 0.1 mm I can then name the pads.

Hide layer 1 and click onto the SMD on bottom. Can you name it now?

When I try to route the component, EAGLE shows the air wires going to the

correct places but it never draws the traces and fails to route.  I have

tried AUTO with grids down to 1 thousandth but it never routes.

The problem is that the hole keeps the autorouter from connecting

the SMDs. The autorouter has to pay attention to the copper/dimension

value set in Design Rules.

But you could for example pre-route a short track manually first.

The autorouter will connect the end of the track then.

Any been able to make a component that goes inside the board between solder

and component layers?

Please keep in mind to export two drill files for the board

manufacturer. One drill file for drills (layer 44 for pads vias, plated)

and one for holes (layer 45, non-plated)

HTH

--

Mit freundlichen Gruessen / Best regards

Richard Hammerl

CadSoft Support -- hotline@cadsoft.de

FAQ: http://www.cadsoft.de/faq.htm

Thank you Richard,

I found I could manually route the upper and lower traces then autoroute

the balance.  I have sent the board to CustomPCB in Malaysia WITHOUT the

two drill files you mention.  I wonder what I will get back??

Cheers

Brian

Richard Hammerl wrote:

Brian Taylor schrieb:

I need to make a new component for an Optek OP124 pill pack diode.  This is

a tiny bullet shaped package designed to be placed in a hole drilled between

the top and bottom sides.  Tthe top side is anode, the bottom side is

cathode.  There must be no plating in the hole.

 

I can place an SMD pad on the bottom layer and another SMD pad on the top

layer.  I can then place a hole of 1.8mm diameter through the pair of pads.

If I place the pads exactly over one another I cannot name the pads.  If  I

displace them 0.1 mm I can then name the pads.

 

Hide layer 1 and click onto the SMD on bottom. Can you name it now?

 

 

When I try to route the component, EAGLE shows the air wires going to the

correct places but it never draws the traces and fails to route.  I have

tried AUTO with grids down to 1 thousandth but it never routes.

 

The problem is that the hole keeps the autorouter from connecting

the SMDs. The autorouter has to pay attention to the copper/dimension

value set in Design Rules.

But you could for example pre-route a short track manually first.

The autorouter will connect the end of the track then.

 

 

Any been able to make a component that goes inside the board between solder

and component layers?

 

Please keep in mind to export two drill files for the board

manufacturer. One drill file for drills (layer 44 for pads vias, plated)

and one for holes (layer 45, non-plated)

 

 

HTH

 

 

Thank you Richard,

I found I could manually route the upper and lower traces then autoroute

the balance.  I have sent the board to CustomPCB in Malaysia WITHOUT the

two drill files you mention.  I wonder what I will get back??

Cheers

Brian

Richard Hammerl wrote:

Brian Taylor schrieb:

I need to make a new component for an Optek OP124 pill pack diode.  This is

a tiny bullet shaped package designed to be placed in a hole drilled between

the top and bottom sides.  Tthe top side is anode, the bottom side is

cathode.  There must be no plating in the hole.

 

I can place an SMD pad on the bottom layer and another SMD pad on the top

layer.  I can then place a hole of 1.8mm diameter through the pair of pads.

If I place the pads exactly over one another I cannot name the pads.  If  I

displace them 0.1 mm I can then name the pads.

 

Hide layer 1 and click onto the SMD on bottom. Can you name it now?

 

 

When I try to route the component, EAGLE shows the air wires going to the

correct places but it never draws the traces and fails to route.  I have

tried AUTO with grids down to 1 thousandth but it never routes.

 

The problem is that the hole keeps the autorouter from connecting

the SMDs. The autorouter has to pay attention to the copper/dimension

value set in Design Rules.

But you could for example pre-route a short track manually first.

The autorouter will connect the end of the track then.

 

 

Any been able to make a component that goes inside the board between solder

and component layers?

 

Please keep in mind to export two drill files for the board

manufacturer. One drill file for drills (layer 44 for pads vias, plated)

and one for holes (layer 45, non-plated)

 

 

HTH

 

 

On Tue, 25 Nov 2008, BrianT wrote to us saying :

I have sent the board to CustomPCB in Malaysia WITHOUT the two drill

files you mention.

The board house I use don't actually require two separate drill files,

but they do require that I note which drill numbers are PTH and which

are not. So far this has worked fine, but I could imagine a potential

problem if I had the same size hole in both types.

--

Rob Pearce                       http://www.bdt-home.demon.co.uk

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