4 Layer PCB via's in Eagle for BatchPCB

Stefan Olsson wrote:

Hi

 

>

4 layer PCB with the setting (12*1516)

 

>

A)

If I start the autorouting and let it execute with no "pre settings

or dedications", will the autorouter just use the layers 2 and 15 as

it use 1 and 16, that is, just use them to make the best routing ?

 

Learn by giving it a go. Read the manual and tutorial included in the DOCs

folder of you installation.

 

B)

How do I a tell EAGLE, before autorouting, only to use layer 2 for

GND and only layer 15 for VCC but it can use layer 1 and 16

unrestricted for signalers ?

 

Place polygons on those layers and name them GND and VCC as required

 

I want to use layer 2 as dedicated GND layer and later flood fill

them so they can be used as heat sinkers.

 

>

C)

If layer 2 and 15 have bene floodfilled and I manually add a via,

this will connect to all 4 layers, effectivly shortcuting GND and VCC

?

NO. you name the vias appropriately and it won't connect to a layer where

the signal name does not match

>

D)

What should I do to avoid to make a shortcut between layer 1, 2, 15

and 16 when manually placing out via's ?

Shall I add an area around the via's that make the area 2 and 15

restricted before flood filling the layer 2 and 15 or is it other

ways to do it ?

 

Same as C. The via needs the correct signal name and thus will isolate

itselef from other signals with  different names.

>

Regards Stefan

--

Viewed / responded via the newsgroup at

news.cadsoft.de

Stefan Olsson wrote:

Hi

 

>

4 layer PCB with the setting (12*1516)

 

>

A)

If I start the autorouting and let it execute with no "pre settings

or dedications", will the autorouter just use the layers 2 and 15 as

it use 1 and 16, that is, just use them to make the best routing ?

 

Learn by giving it a go. Read the manual and tutorial included in the DOCs

folder of you installation.

 

B)

How do I a tell EAGLE, before autorouting, only to use layer 2 for

GND and only layer 15 for VCC but it can use layer 1 and 16

unrestricted for signalers ?

 

Place polygons on those layers and name them GND and VCC as required

 

I want to use layer 2 as dedicated GND layer and later flood fill

them so they can be used as heat sinkers.

 

>

C)

If layer 2 and 15 have bene floodfilled and I manually add a via,

this will connect to all 4 layers, effectivly shortcuting GND and VCC

?

NO. you name the vias appropriately and it won't connect to a layer where

the signal name does not match

>

D)

What should I do to avoid to make a shortcut between layer 1, 2, 15

and 16 when manually placing out via's ?

Shall I add an area around the via's that make the area 2 and 15

restricted before flood filling the layer 2 and 15 or is it other

ways to do it ?

 

Same as C. The via needs the correct signal name and thus will isolate

itselef from other signals with  different names.

>

Regards Stefan

--

Viewed / responded via the newsgroup at

news.cadsoft.de