PCB123 Capabilities

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PCB123 Capabilities

Postby Sal Hernandez » Mon May 14, 2012 9:30 am

    Board Thickness
  • .031 thickness available on 2 layer boards with solder mask and 1 oz Cu
  • .062 Thickness available with all configurations

    Copper thickness
  • 1 oz Cu available on all configurations
  • 2.5 oz Cu available on 2 layer boards with solder mask and .062 Thickness

    Solder Finish
  • Tin/lead
  • RoHS (lead free) Immersion Silver

    Pads
  • When 1 oz Cu is selected, pads for holes should be .016 to .050 larger than the selected finished hole size.
  • When 2.5 oz Cu is selected pads for holes should be .028 to .062 larger than the selected finished hole size.

    Drill
  • All holes are through from top to bottom layer of board.
  • For holes = .070: finished holes should be separated, hole edge to hole edge, by a minimum distance of .017.
  • Smallest finished plated hole available is .008" +0/-.008".
  • We cannot guarantee Non-Plated holes will be non-plated. The resist on holes = .150 may break down and allow plating into holes.
  • No Blind or buried vias.
  • The largest finished drilled plated hole size available is .25",

    Material
  • FR4 150 Tg Minimum
  • Dielectric constant 4.5 +/- .1
  • Maximum operating temperature 130o C

    Solder mask options
  • 2 sides
  • Green Mask only
  • A 3 mil solder mask swell is provided for all pins/pads.

    Silkscreen options
  • 2 sides available
  • White silk only

    Fabrication
  • Individual routing only
  • Route a single continuous outline using a .093 router. The edge of the router moves a long the center of the provided outline to route the board shape. A notch in the board outline must be at least .1 to allow room for the router. A notch smaller than .1 can be ordered through the Full Feature or Custom Quote service.
  • Up to 4 slots and cutouts
Regards,

Sal Hernandez
Software Support Engineer I
Sunstone Circuits
13626 S. Freeman Road
Mulino, OR 97042
Phone: 503-829-9108 x226
Fax: 503-829-5482
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Sal Hernandez
 
Posts: 396
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Re: PCB123 Capabilities - RoHS

Postby DougM » Wed May 15, 2013 9:22 pm

Hi Sal,

This capabilities list is the only place I've seen mentioned the FR4 temperature rating Tg140. It is good that you offer a RoHS finish of silver, but my understanding is that due to higher temperature lead free solders used, that a temperature rating of Tg170 or higher is required for most if not all RoHS processes.

Specifically, can we order Tg170 as an option? Generally, is it your intention to offer fabs which are 100% RoHS compatible, and how well are you doing at that?

Thanks,
Doug
DougM
 
Posts: 10
Joined: Wed May 15, 2013 7:20 pm

Re: PCB123 Capabilities

Postby Sal Hernandez » Mon May 20, 2013 8:09 am

Capabilities updated to reflect the minimum 150 Tg material we offer.

Our standard double sided material is all 150Tg. We can order 170Tg double sided material if needed (full-feature or custom quote if there is a documented callout)
Our multilayer we carry both 150Tg and 170Tg and for most of the product we will use this material interchangeably unless specified on a drawing or readme (full-feature or custom quote).

That being said, both material Tg are RoHS compliant and compatible. While the Tg is a measure of the gel temperature and has become the industry measure for material reliability, it is only one measure and cannot be used alone to identify the suitability to an application, there are other electrical and mechanical properties for every material that will tell the entire story. For RoHS assembly the key properties to consider are the Td (Decomposition temperature) and the CTE (coefficient of thermal expansion). Both the 150 Tg material and the 170Tg material have ratings in these 2 key attributes that exceed the requirements for lead free assembly. We have been offering the 150Tg material as a lead free solution for more than 7 years and have not had any negative feedback from the material not being able to handle the elevated temperatures etc associated with the lead free assembly.
Regards,

Sal Hernandez
Software Support Engineer I
Sunstone Circuits
13626 S. Freeman Road
Mulino, OR 97042
Phone: 503-829-9108 x226
Fax: 503-829-5482
User avatar
Sal Hernandez
 
Posts: 396
Joined: Wed Jul 06, 2011 12:00 am

Re: PCB123 Capabilities

Postby DougM » Wed Mar 12, 2014 10:45 pm

Hi Sal,

Old topic here, but I was curious about it again. You said last time that Tg150 and Tg170 was used interchangeably with PCB123 boards. I was wondering if this was still the case, or whether perhaps odds were higher of getting Tg170 when one selected "lead-free" in the options. Any experience with what happens to a 150 board baked at 170?

Thanks,
Doug
DougM
 
Posts: 10
Joined: Wed May 15, 2013 7:20 pm

Re: PCB123 Capabilities

Postby Sal Hernandez » Mon Mar 17, 2014 7:34 am

We do still use interchange the 150 and 170 Tg material. Both materials are lead-free options. If you must specify the material to be used you should order through our Full Feature service with fabrication notes stating the Tg you need. We have not had any issues interchanging these materials for RoHS boards.
Regards,

Sal Hernandez
Software Support Engineer I
Sunstone Circuits
13626 S. Freeman Road
Mulino, OR 97042
Phone: 503-829-9108 x226
Fax: 503-829-5482
User avatar
Sal Hernandez
 
Posts: 396
Joined: Wed Jul 06, 2011 12:00 am




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