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Subject:
From:
Werner Engelmaier <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Werner Engelmaier <[log in to unmask]>
Date:
Wed, 22 Dec 2010 13:30:50 -0500
Content-Type:
text/plain
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text/plain (256 lines)
 Change of subject, please.
Werner

 


 

 

-----Original Message-----
From: Stadem, Richard D. <[log in to unmask]>
To: [log in to unmask]
Sent: Wed, Dec 22, 2010 1:00 pm
Subject: Re: [TN] AW: [TN] Needed reference


I suspect that Torsten may be looking for information on being able to perform 

the ultrasonic welding on the plastic case without damaging the gyro and 

accelerometer ICs soldered to the CCAs inside, which are typically MEMS and are 

thus very sensitive to ultrasonic energy and could possibly be damaged. Torsten, 

if that is your concern, then I would encourage you to talk to Dr. Sami Awad at 

Crest Ultrasonics, who is an expert on the subject. You can reach him at:

http://www.crest-ultrasonics.com/downloads.html (609) 883-4000.

I encourage you to also talk to Hermann Ultrasonics, http://www.herrmannultrasonics.com 

as they are very knowledgeable regarding plastic welding of electronics 

encasements.



Having direct experience with soldering of ceramic wedge-mounted MEMS gyros and 

accelerometers, I would encourage you to find a way to heat-seal or epoxy bond 

the case without the ultrasonic welding. 



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of John Goulet

Sent: Wednesday, December 22, 2010 10:52 AM

To: [log in to unmask]

Subject: Re: [TN] AW: [TN] Needed reference



I've used the Branson Ultrasonic welder for several projects. You cold check 

their website for types of applications and possibly other models. I know where 

there is one in surplus. 



The contract assembler was holding onto it just in case another job came up. 



After so many years they may be willing to sell it. 



Sincerely 



John Goulet 



MFG/Process Engineer 

----- Original Message ----- 

From: "Torsten Hagge" <[log in to unmask]> 

To: [log in to unmask] 

Sent: Wednesday, December 22, 2010 4:15:43 AM 

Subject: [TN] AW: [TN] Needed reference 



Hi, 



has anybody info about ultrasonic welding of plastic housing with electronic 

PCBs inside? We have done such process with simple mobile phone boards several 

years ago, but at the current project a gyro and an accelerometer IC are on the 

PCB, together with a lithium battery... 



Alternative is laser welding, but that process is much more expensive... 



Best Regards,   



i.A. Dipl.Ing.(FH)Torsten Hagge 

tech. projectmanager 

Kristronics GmbH 

Gewerbegrund 5 - 9 

24955 Harrislee 

  

Tel.:    +49 461 7741 624 

Fax:     +49 461 7741 642 

[log in to unmask] 

www.kristronics.de 

  

Gerichtsstand Flensburg, Handelsregister: HRB 1433 FL 

Geschäftsführer Dipl.-Ing. oec. Thormod Ohm 

Ust-Id-Nr. DE 811182059 

Bankverbindung: Deutsche Bank AG Flensburg, Konto-Nr. 4216610, BLZ 21570011 

IBAN: DE32 2157 0011 0421 6610 00, BIC: DEUT DE HH 215 



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