Routing SMD device with 0.5mm pitch

Hello Kenny !:

Hello everyone,

 

I'm having trouble routing signals to an SMD device which has 0.5mm pitch

connections which are just 0.35mm apart.

It's a 16 way FPC (Flexible ribbon cable) connector. (Similar to Molex

52746)

 

I have attached a sample board and schematic (SMD_CON.sch), and the library

with my part in it.

I have created a CLASS with wire thickness of just 0.35mm and clearance of

just 0.15mm. In the auto router I set the routing grid to just 0.1mm, but

still it will not route the signals.

 

I guess I am just not using the correct approach.

Can anyone help me?

Best way is to roule manually all track from the connector away ....

Maybe then you can start the autorouter but the ends of the manually

routed wires should have more distance than 0,5 mm - and of course on grid.

HTH

--

Grzegorz Zalot

complex ltd.

office tel/fax : +48 32 2505840

mobil : +48 501 301515

http://www.complex.org.pl/

Excellent suggestion.

Many thanks.

-Kenny

"Grzegorz Zalot" <complex@alpha.pl> wrote in message

news:fr8jjv$jvd$1@cheetah.cadsoft.de...

Hello Kenny !:

Hello everyone,

 

I'm having trouble routing signals to an SMD device which has 0.5mm pitch

connections which are just 0.35mm apart.

It's a 16 way FPC (Flexible ribbon cable) connector. (Similar to Molex

52746)

 

I have attached a sample board and schematic (SMD_CON.sch), and the

library with my part in it.

I have created a CLASS with wire thickness of just 0.35mm and clearance

of just 0.15mm. In the auto router I set the routing grid to just 0.1mm,

but still it will not route the signals.

 

I guess I am just not using the correct approach.

Can anyone help me?

 

Best way is to roule manually all track from the connector away ....

Maybe then you can start the autorouter but the ends of the manually

routed wires should have more distance than 0,5 mm - and of course on

grid.

 

HTH

--

Grzegorz Zalot

 

complex ltd.

office tel/fax : +48 32 2505840

mobil : +48 501 301515

 

http://www.complex.org.pl/

Kenny wrote:

Hello everyone,

 

I'm having trouble routing signals to an SMD device which has 0.5mm pitch

connections which are just 0.35mm apart.

It's a 16 way FPC (Flexible ribbon cable) connector. (Similar to Molex

52746)

 

I have attached a sample board and schematic (SMD_CON.sch), and the library

with my part in it.

I have created a CLASS with wire thickness of just 0.35mm and clearance of

just 0.15mm. In the auto router I set the routing grid to just 0.1mm, but

still it will not route the signals.

 

I guess I am just not using the correct approach.

Can anyone help me?

 

In case the attachment is not allowed, it is also available here:

http://www.kennymillar.co.uk/SMD_CON.zip

 

Thanks in advance.

 

-Kenny M.

 

Kenny;

Your connector has 0.35mm wide smd pads that are on a 0.50mm pitch (pad

center to center).  The best way to route this is to start from the SMD

pads to the through hole connector pads, using 0.3mm traces.  DRC will

complain a lot simply because the SMD pads are too close, if you use the

default settings.

I've include a zip file (SMD_CON_1.ZIP) to show how I manually routed

the traces.

HTH

-Dave Pollum