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Nano coatings ?

Views: 5296

#68279

Nano coatings ? | 22 February, 2013

I have been told that stencil nano-coatings are rain-x in a different container. I guess I half believed it until I opened up a sample the other day. It smells EXCACTLY like rain-x. For those of you that have never smelled rain-x it has a very distinct odor. It's not easily confused with something else.

Does anyone know if they are the same thing or close to ?

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#68283

Nano coatings ? | 22 February, 2013

I don't know, what you have, but I just got back from the IPC APEX show and I'll make several points: * One take away about 'nano ...' is that it means different things to different people. For instance, in stencil printing: ** DEK uses Aculon and it is a flux repellent ** LaserJob uses Siemens and it is an anti-adhesion ** FCTA uses their own mix that is an anti-adhesion * Next, when I say this, I don't mean to imply anything about anyone, [and particularly about the companies mentioned above that seem to have very good products] but as 'nano ...' becomes more widespread in it's use, I'd be very careful in the selection and qualification of materials. * Further, recognize that some forms of this stuff can be an environmental and health hazard. * Be careful, from a process stand point, your cleaning chemistry has to be pH neutral or you'll kill this stuff. * Finally, I'm concerned that nano ... becomes snake oil. Everything will become nanowhatever.

BR, davef

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#68293

Nano coatings ? | 25 February, 2013

Hi Davef,

The question is which product is better ?

Do you know if there is some kind of research regarding these (or maybe others)materials ?

best regards,

Oded

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#68296

Nano coatings ? | 25 February, 2013

I do not have the warm and fuzzy feel about these coatings due to the lack of supporting data. Aside from trying to save some money on wiper paper I do not see an advantage that would justify it.

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#68297

Nano coatings ? | 25 February, 2013

Oded: The coatings that I mention serve different purposes. * Antiadhesions seem to be designed to improve paste release from the stencil * Flux repellents seem to be aimed at reducing the under wipe frequency of stencils.

At IPC APEX 2013, DEK and Aculon presented papers: * Big Ideas on Miniaturisation, Clive Ashmore, Mark Whitmore & Jeff Schake, DEK Printing Machines Ltd * Low Surface Energy Coatings, Rewrites the Area Ratio Rules, Ricky Bennett, Assembly Process Technologies, Flemington, New Jersey & Eric Hanson, Aculon, San Diego, California

My contact at LaserJob is: Eric Moen, Director of Sales & Marketing 770-807-4707 eric.moenatlaserjob.com

My contact at FCTA is: Jeremy Glanzer, Marketing, 970-214-4854 jglanzeratfctassembly.com

I believe that Kyzen wrote a white paper on cleaning coated stencils.

BR, davef

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#68298

Nano coatings ? | 25 February, 2013

Señor Tech: You're correct. I get the impression that these coatings are aimed at solving specific problems. If you don't have that kind of pain, why get involved?

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#68299

Nano coatings ? | 25 February, 2013

davef, can you ask the companies to post their papers in the technical section and link to them from this post?...

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#68343

Nano coatings ? | 3 March, 2013

Hello Davef,

Can you please share some links to these papers ?

BR, Oded.

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#68344

Nano coatings ? PAPERS!!! ... We want papers! | 3 March, 2013

Windhorse and o.k. I have pdf of both papers, but don't yet have a release from the authors to republish them.

BR, davef

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#68362

Nano coatings ? PAPERS!!! ... We want papers! | 5 March, 2013

Here is "Compatibility Of Cleaning Agents With Nano-Coated Stencils" David Lober and Mike Bixenman, D.B.A., Kyzen Corporation: http://digital.trafalgarmedia.com/issue/46004/25

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#68459

Nano coatings ? PAPERS!!! ... We want papers! | 18 March, 2013

I was at an SMTA meeting Friday. One of the topics of discussion was nano coatings.

1. Nobody wants to talk about where the coating goes as it wears off. 2. There are different types of nano coatings : Chemically bonded which involves a special bonding process and manually applied.(wipes)

Some chemically bonded processes use a colored dye so you can see when the coating begins to fail. Claims of 80K + prints were made.

Another point: your solder paste roll potentially no longer "rolls"...it skids across the stencil because of the lack of friction.

My guess is that you won't be hearing about this too much longer.

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#68462

Nano coatings ? PAPERS!!! ... We want papers! | 18 March, 2013

The paste is going to roll as before because you have to apply the coating on the bottom side of the stencil. Also the coating that wears out will most probably go to your stencil cleaning paper as that the process wehn you actually have friction with this layer.

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#68463

Nano coatings ? PAPERS!!! ... We want papers! | 19 March, 2013

Evtimov, I stand corrected. At the meeting they were talking about nano coated squeegee blades causing the rolling issues.

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#68465

Nano coatings ? PAPERS!!! ... We want papers! | 19 March, 2013

OK,

now it makes perfect sense.

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#70453

Nano coatings ? PAPERS!!! ... We want papers! | 20 August, 2013

I believe that Rain-X contains silicone and Nano-ProTek solution does not.

I did speak with a field service guy for Nano-Protek and he told me the special coating test pen that they offer is just a sharpie with their logo on it. Thats how I test to see if my stencil coatings are still there and it has worked so far. Also, in my experience, and his, alcohol does not remove the coating. As that was my initial reason for calling.

I have only noted a significant improvement to a coated stencil with some fine pitch apertures on thinner stencils (4mil) when we were experiencing insufficient solder joints.

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