Laser process parameters are key to the amount of damage to the edges or
their appearance. One may hit the right parameters first time or have to do
some optimization.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: Monday, September 20, 2010 11:40 AM
To: [log in to unmask]
Subject: Re: [TN] Laser de-panilization
Folks,
"Laser de-penalization Process"
Any visual damage/distortion to the laminate edge?
What does the edge look like, smooth/jagged?
Can you share some offline photos of the edge.
What board thickness are you talking about?
Does copper weight and/or laminate matters?
"X",
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Eddie Rocha
Sent: Monday, September 20, 2010 11:23 AM
To: [log in to unmask]
Subject: Re: [TN] looking for castellation board vendor recommendation
At South Bay Circuits we fab boards with castellated holes routinely. 1"
square and down to .020 thk., using Rogers laminate. Panelization is key,
along with several non-standard processes to avoid burrs on the castellated
holes.
thanks,
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Steven Creswick
Sent: Saturday, September 18, 2010 6:06 AM
To: [log in to unmask]
Subject: Re: [TN] looking for castellation board vendor recommendation
Ahne,
You just did! :-) Thanks
Do you see any tearing of the foil at the castellation, or can the high
power UV laser also cut the foil?
Steve Creswick
http://www.linkedin.com/in/stevencreswick
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ahne Oosterhof
Sent: Friday, September 17, 2010 7:06 PM
To: [log in to unmask]
Subject: Re: [TN] looking for castellation board vendor recommendation
How come nobody has mentioned LASER depanneling yet?
I started doing that several years ago for flex circuits, but by now with
more powerful UV lasers you can do it for regular circuit boards.
Ahne.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Richard Hatano
Sent: Friday, September 17, 2010 15:28
To: [log in to unmask]
Subject: Re: [TN] looking for castellation board vendor recommendation
Hi Steven,
Thank you very much for your advice. I appreciate it and have saved it and
forwarded it to my co-workers who will help with the assembly.
I hope you have a good weekend.
Richard
On Thu, Sep 16, 2010 at 5:03 PM, Steven Creswick
<[log in to unmask]>wrote:
> Richard,
>
> Can not recommend a specific supplier either, however would recommend that
> you diamond saw the boards to singulate rather than score and break, etc.
>
> Most hybrid mfrs that deal with ceramics, or dicing of wafers can easily
> saw
> generic laminates, leaving the module with mirror smooth edges and little
> tearing, smearing of the castellation metallization. Amounts to selection
> of blade, feed and speed. Have diced boards ranging from 0.010-0.062"
> thick
> using this method.
>
> Since your have a single-sided board, one would just attach the board to a
> sacrificial plate [glass for example] with a water soluble wax after
> assembly. Problems will surface if the board is warped, or tall
components
> are near the edges where the hub of the dicing blade may hit.
>
> Getting the board is the easy task. Am sure that you can find a facility
> somewhere nearby that can dice them for you...
>
>
> Steve Creswick
> http://www.linkedin.com/in/stevencreswick
>
>
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Richard Hatano
> Sent: Tuesday, September 07, 2010 1:57 PM
> To: [log in to unmask]
> Subject: [TN] looking for castellation board vendor recommendation
>
> Hello Everyone,
>
> It's been a few years since I've been on TechNet, and it's good to see
some
> familiar names. I hope you're all doing well in these difficult times.
>
> I know my question begs more questions, but I would like to hopefully keep
> it simple by asking if anyone can recommend a pcb fab company to get some
> boards with castellated edges made.
>
> Right now these are prototype and I don't know what the quantity will
> eventually be. Other than the castellation there is nothing strange about
> them. They are less than 1 sq. in. in area, 4 layer, SMD one side, 6/6
mil
> trace/space, 14 mil via. Having thinner boards (0.031") would be
preferred
> but seems to really impact cost, so it is a secondary parameter.
>
> If anyone can reply with a recommendation it would be hugely appreciated.
>
> Thanks,
>
> Richard
>
>
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