lol....that's our business! We usually get the work no one else wants to do
themselves so it's great for increasing our experience level. We've coated
boards that have gone to Mars and boards that got installed in a paintball
gun. The latter was more difficult.
Lloyd Duso
Plant Manager
Diamond-MT
(814) 535-3505
www.Diamond-mt.com
On Tue, Jun 20, 2017 at 8:15 AM, Douglas Pauls <
[log in to unmask]> wrote:
> But I know Lloyd loves a challenge.....
>
>
> Doug Pauls
> Principal Materials and Process Engineer
> Rockwell Collins
>
> On Tue, Jun 20, 2017 at 6:31 AM, lduso - Diamond-MT.com <
> [log in to unmask]> wrote:
>
>> We often use the Kapton for masking when we want the tape to cause
>> de-wetting. Like when using UV40 UV cure, the dewetting makes it easier to
>> demask. If you cure the UV material over the green tape, it's damn near
>> impossible to remove.
>>
>> Lloyd Duso
>> Plant Manager
>> Diamond-MT
>> (814) 535-3505
>> www.Diamond-mt.com
>>
>> On Mon, Jun 19, 2017 at 7:08 PM, Yuan-chia Joyce Koo <[log in to unmask]>
>> wrote:
>>
>> > dupont Kapton is not everybody cup of tea. many "Kapton" equivalent
>> with
>> > silicone or acrylic adhesive leave residue on the gold wire bonding pad,
>> > but not Dupont Kapton... if you can find true Dupont, stay with them.
>> > (from what I heard, they only sell the roll of kapton tape now, but let
>> 3rd
>> > party put on what ever the adhesive.... so your Dupont may have
>> different
>> > adhesive... (still have half roll of Kapton... true one as collection...
>> > thick, enough to patch up stacking issue to prevent short...).
>> > good old days.
>> > jk
>> >
>> > On Jun 19, 2017, at 5:42 PM, Wayne Thayer wrote:
>> >
>> > I believe that the right silicone based PSA would work fine. No one is
>> >> more concerned about contamination than plating shops. "Plater's tape"
>> is a
>> >> mylar carrier with silicone adhesive. It's used in PCB fabs all of the
>> >> time. But I guess the silicone is in a highly stabilized form that
>> doesn't
>> >> leach oil like the masking dots Phil is mentioning below. I've used
>> DuPont
>> >> Kapton tape with silicone adhesive, and I've never had an oil leaching
>> >> problem. Not good stuff for masking because the polyimide material
>> itself
>> >> causes the paint to bead up.
>> >>
>> >> When I opened an R&D board fab lab, I chased out all silicone based
>> >> compounds. So I learned about how bad the acrylic PSAs are: Those tapes
>> >> drop little globs of acrylic PSA EVERYWHERE. True, they don't cause
>> >> de-wetting like silicone has the potential to do, but they block
>> plating
>> >> where they've decided to stick anyway. If you want a real nightmare try
>> >> plastering those danged "Post-It" notes on everything: the weakening
>> done
>> >> to allow them to be easily re-positioned frees up the acrylic globs.
>> >>
>> >> Anyway, this is a divergence because for relatively crude masking
>> >> applications on surfaces that don't have to be perfectly clean,
>> standard
>> >> painter's materials are fine if you can address the static.
>> >>
>> >> Wayne
>> >>
>> >> -----Original Message-----
>> >> From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig Sullivan
>> >> Sent: Monday, June 19, 2017 1:58 PM
>> >> To: [log in to unmask]
>> >> Subject: Re: [TN] Conformal coat tape of acrylic
>> >>
>> >> Phil,
>> >>
>> >> Yes, I agree. I am not even looking at anything with a silicone
>> adhesive.
>> >> I've been extremely cautions not to introduce silicone into our process
>> >> over the years. I've even gone as far as telling the tape slitters not
>> to
>> >> use the silicone solution on their blades when slitting our orders.
>> >>
>> >>
>> >> -----Original Message-----
>> >> From: TechNet [mailto:[log in to unmask]] On Behalf Of Nutting, Phil
>> >> Sent: Monday, June 19, 2017 4:26 PM
>> >> To: [log in to unmask]
>> >> Subject: Re: [TN] Conformal coat tape of acrylic
>> >>
>> >> Craig,
>> >>
>> >> We use Konform AR and at some point our acrylic adhesive masking dots
>> >> were discontinued and replaced with a silicone based adhesive. The
>> >> silicone worked, however I saw an odd fish eye pattern and blooming
>> under
>> >> UV light around the dots. You could watch the blooming as it cured.
>> >>
>> >> My 2 cents is to test the new mask materials with your coating and
>> watch
>> >> under UV light.
>> >>
>> >>
>> >> Phil Nutting | HVP Development Engineer | Excelitas Technologies
>> Corp
>> >>
>> >> Lab: +1 978.224.4332 | Office: +1 978.224.4152
>> >> 35 Congress St, Salem, MA 01970 USA
>> >> [log in to unmask]
>> >> www.excelitas.com
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> Please consider the environment before printing this e-mail.
>> >>
>> >> This email message and any attachments are confidential and proprietary
>> >> to Excelitas Technologies Corp. If you are not the intended recipient
>> of
>> >> this message, please inform the sender by replying to this email or
>> sending
>> >> a message to the sender and destroy the message and any attachments.
>> Thank
>> >> you.
>> >>
>> >> -----Original Message-----
>> >> From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig Sullivan
>> >> Sent: Monday, June 19, 2017 1:31 PM
>> >> To: [log in to unmask]
>> >> Subject: Re: [TN] Conformal coat tape of acrylic
>> >>
>> >> Thank you. I’ve requested samples of those recommended. Much to my
>> >> surprise, I also found some on Humiseal’s website so I asked for
>> samples of
>> >> that as well.
>> >>
>> >>
>> >>
>> >> Steve: Yes, we go through rolls of that as well. But we have a couple
>> of
>> >> new assemblies where it’s giving us issues for some reason. I first
>> thought
>> >> it was cleanliness, then possibly just a bad lot of tape, but I’ve
>> >> exhausted those conditions.
>> >>
>> >>
>> >>
>> >> Craig Sullivan
>> >>
>> >> Manufacturing Engineer
>> >>
>> >> IT Administrator
>> >>
>> >> Phone: (607) 266-0480 x115
>> >>
>> >> Fax: (607) 266-0482
>> >>
>> >> Email: [log in to unmask]
>> >>
>> >> Web: www.mplinc.com <http://www.mplinc.com/>
>> >>
>> >>
>> >>
>> >> MPL, Inc.
>> >>
>> >> 41 Dutch Mill Road | Ithaca | NY | 14850
>> >>
>> >> An ISO 9001:2008 Certified and ITAR Registered Company
>> >>
>> >> IPC member since 2004
>> >>
>> >>
>> >>
>> >> _____
>> >>
>> >> Confidentiality Notice:
>> >> This e-mail contains privileged and confidential information which is
>> the
>> >> property of MPL Incorporated, intended only for the use of the intended
>> >> recipient(s). Unauthorized use or disclosure of this information is
>> >> prohibited. If you are not an intended recipient, please immediately
>> notify
>> >> MPL Incorporated and destroy any copies of this email. Receipt of this
>> >> e-mail shall not be deemed a waiver by MPL Incorporated of any
>> privilege or
>> >> the confidential nature of the information.
>> >>
>> >> Export Control:
>> >> This message is intended only for the addressee and may contain
>> >> information that is company confidential or privileged. Any technical
>> data
>> >> in this message may be exported only in accordance with the U.S.
>> >> International Traffic in Arms Regulations (22 CFR Parts 120-130) or the
>> >> Export Administration Regulations (15 CFR Parts 730-774). Unauthorized
>> use
>> >> is strictly prohibited and may be unlawful. If you are not the intended
>> >> recipient, or the person responsible for delivering to the intended
>> >> recipient, you should not read, copy, disclose or otherwise use this
>> >> message. If you have received this email in error, please delete it,
>> and
>> >> advise the sender immediately.
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> From: lduso - Diamond-MT.com [mailto:[log in to unmask]]
>> >> Sent: Monday, June 19, 2017 12:29 PM
>> >> To: TechNet E-Mail Forum; Craig Sullivan
>> >> Subject: Re: [TN] Conformal coat tape of acrylic
>> >>
>> >>
>> >>
>> >> 3m Green Tape 233+. The most common size we use is the 3/4", p/n 26334.
>> >> Slightly stronger adhesion than the blue. We still stock the blue for
>> >> masking delicate components, like radial resistors, specifically
>> because it
>> >> has low adhesion and there is less chance of damaging the components on
>> >> demask.
>> >>
>> >>
>> >>
>> >>
>> >> Lloyd Duso
>> >>
>> >> Plant Manager
>> >>
>> >> Diamond-MT
>> >> (814) 535-3505
>> >>
>> >> www.Diamond-mt.com
>> >>
>> >>
>> >>
>> >> On Mon, Jun 19, 2017 at 11:59 AM, Craig Sullivan <[log in to unmask]
>> >
>> >> wrote:
>> >>
>> >> What masking tape is everyone using for Type AR coatings?
>> >>
>> >>
>> >>
>> >> Long story short:
>> >>
>> >> We used to use the St. Gobain M797 which was also known as Humiseal's
>> >> HT-500. Due to numerous manufacturer issues, we stopped using it.
>> >>
>> >> One of our customers spec'd in the blue 3m painter's tape and we have
>> >> been using it successfully for a while.
>> >>
>> >> We have some new assemblies where the 3m adhesion is terrible and am
>> now
>> >> back onto looking for a new tape, similar to what we all went through
>> some
>> >> 8 years ago.
>> >>
>> >>
>> >>
>> >> Craig Sullivan
>> >>
>> >> Manufacturing Engineer
>> >>
>> >> IT Administrator
>> >>
>> >> Phone: (607) 266-0480 x115
>> >>
>> >> Fax: (607) 266-0482
>> >>
>> >> Email: <mailto:[log in to unmask]> [log in to unmask]
>> >>
>> >> Web: <http://www.mplinc.com/> www.mplinc.com
>> >>
>> >>
>> >>
>> >> MPL, Inc.
>> >>
>> >> 41 Dutch Mill Road | Ithaca | NY | 14850
>> >>
>> >> An ISO 9001:2008 Certified and ITAR Registered Company
>> >>
>> >> IPC member since 2004
>> >>
>> >>
>> >>
>> >> _____
>> >>
>> >> Confidentiality Notice:
>> >> This e-mail contains privileged and confidential information which is
>> the
>> >> property of MPL Incorporated, intended only for the use of the intended
>> >> recipient(s). Unauthorized use or disclosure of this information is
>> >> prohibited. If you are not an intended recipient, please immediately
>> notify
>> >> MPL Incorporated and destroy any copies of this email. Receipt of this
>> >> e-mail shall not be deemed a waiver by MPL Incorporated of any
>> privilege or
>> >> the confidential nature of the information.
>> >>
>> >> Export Control:
>> >> This message is intended only for the addressee and may contain
>> >> information that is company confidential or privileged. Any technical
>> data
>> >> in this message may be exported only in accordance with the U.S.
>> >> International Traffic in Arms Regulations (22 CFR Parts 120-130) or the
>> >> Export Administration Regulations (15 CFR Parts 730-774). Unauthorized
>> use
>> >> is strictly prohibited and may be unlawful. If you are not the intended
>> >> recipient, or the person responsible for delivering to the intended
>> >> recipient, you should not read, copy, disclose or otherwise use this
>> >> message. If you have received this email in error, please delete it,
>> and
>> >> advise the sender immediately.
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>>
>
>
|
