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December 2001

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Subject:
From:
Paul Gill <[log in to unmask]>
Reply To:
Date:
Mon, 10 Dec 2001 14:58:38 -0800
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My last post was intended only for Glenn.

Some times the fingers are faster than the mind.

Paul Gill
Sr. Process Development Engineer
Finisar Corporation
1 408 541 5626


-----Original Message-----
From: Paul Gill [mailto:[log in to unmask]]
Sent: Monday, December 10, 2001 2:51 PM
To: TechNet E-Mail Forum.
Subject: RE: [TN] BGA Visual Inspection - Name Correction


Glenn Woodhouse,

How are thing in Nampa?

It's been a while.

I was searching through the Technet (I have about 2700 unread in a folder)
and I came across your name.  This was from a post back in August.

A couple mouse clicks later and I notice that you posted today from
MCMS.  Glad to hear that your still there.

Are things going well?  Comparatively?

BTW the e-mail back in august had some great information about AOI.
Did MCMS purchase an AOI?  Can you tell me which one?  Are you happy with
the choice?

Thanks

Paul Gill
Sr. Process Development Engineer
Finisar Corporation
1 408 541 5626


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Glenn Woodhouse
Sent: Monday, December 10, 2001 9:06 AM
To: [log in to unmask]
Subject: Re: [TN] BGA Visual Inspection - Name Correction


Whoops.  For anyone trying to search for the BGA inspection scope I posted
on, I completely botched the spelling of the company and product.  The
company is "Caltex", and the scope is the "Hirox" at www.bgascope.com.  You
can find the ERSA Scope at www.ersa.de.

Sorry for any inconvenience,

         Glenn Woodhouse
                 MCMS
Advanced Technology Development

> -----Original Message-----
> From: Glenn Woodhouse
> Sent: Monday, December 10, 2001 8:35 AM
> To:   'TechNet'
> Subject:      RE: BGA Visual Inspection
>
> Greg,
>
> The ERSA is a fine piece of equipment.  When considering it you must take
> into account the production environment it must survive.  The prism used
> in the tip is vulnerable to damage (i.e., collisions with components such
> as caps and resistors around BGA's).  Replacement is costly and requires
> sending the tip assembly to ERSA for replacement.  When we evaluated the
> ERSA Scope a year ago, the repair process was to provide ERSA with a p.o.
> (several hundred $'s), they would send out a loaner tip, you would send
> your tip to ERSA where it would be repaired in Germany, weeks later you
> would receive your tip back and either be partially credited or
> additionally billed depending on the extent of the damage and difficulty
> of the repair, and then you would send the loaner back to ERSA.  This
> cumbersome and costly process may have since changed but you would want to
> check into this.
>
> There is another scope, the Cal-Tech "Hi-Roc" scope that is very similar
> in cost and performance but utilizes easily replaceable (takes minutes
> with your own people) plastic prisms.  We did a side-to-side comparison
> and this is what we ultimately bought.  We could not discern any
> appreciable difference in optical quality between the two although the
> Hi-Roc uses a plastic prism and the ERSA uses a glass one.  Because we
> were using the scope in a volume production inspection process we couldn't
> live with the replacement costs associated with the ERSA.  Within the
> first couple of months we replaced at least four prisms until the
> production shifts got comfortable with the level of delicacy associated
> with this type of equipment.
>
> If you will be using your scope in more of a lab inspection environment
> with control over who is using the scope and the training they have
> received, this level of prism damage likely won't occur, but in my humble
> opinion it is still a matter of "when" the prism gets damaged, not "if".
>
> ERSA has a very nice software package available with their machine that
> includes prepopulated component images that display acceptable and
> rejectable conditions along with the live image of the part under
> inspection, including potential root cause comments.  You can add to and
> customize this image/comment library for your own criteria and conditions.
>
> Good Luck,
>
>          Glenn Woodhouse
>                  MCMS
> Advanced Technology Development
>
> ----- Original Message -----
> From: "Anderson, Greg (IndSys, GEFanuc, NA)" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, December 07, 2001 8:43 AM
> Subject: [TN] BGA Visual Inspection
>
>
> > > TechNet Friends,
> > >       We are looking into visual inspection of BGAs to supplement our
> > > X-Ray inspection.  I am somewhat familiar with the ERSASCOPE.  It
> appears
> > > to be a fully developed, well-thought out system, with all the options
> to
> > > make life easy.  It appears that their supplemental tools in fact, do
> add
> > > value to the endoscope itself.  This, of course, comes at a price.
> > >       I'm hoping to hear from people who have personally evaluated
> such
> > > tools.
> > >       Are all the features of the ERSA truly benefits?
> > >       Are there other systems that do what the ERSASCOPE does?  Are
> they
> > > as fully developed as the ERSA?
> > >
> > > Thanks for your help with this one,
> > >
> > >
> > > Greg Anderson
> > > Senior Advanced Manufacturing Engineer
> > > GE Fanuc Automation
> > > Charlottesville, VA 22911
> > > Phone:  434-978-5181
> > > FAX:  434-978-5898
> > > e-mail: [log in to unmask]

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