make sure you don't have anything that is movable:  mems, vibration  
membrane for example.
On Aug 15, 2014, at 2:23 PM, Douglas Pauls wrote:

> Phil,
> I would say it is an acceptable practice.  There is a lot of  
> entrenched
> rumor and myth from the very early days of ultrasonic cleaning,  
> when the
> frequencies and power levels used damaged bond wires in ICs.  But  
> modern
> ultrasonic cleaners use frequencies and power levels know to be safe.
>
>
> Doug Pauls
> Principal Materials and Process Engineer
> Rockwell Collins
>
>
> On Fri, Aug 15, 2014 at 1:18 PM, Nutting, Phil  
> <[log in to unmask]>
> wrote:
>
>> Is it a common or acceptable practice to use an ultrasonic cleaner  
>> to wash
>> SMT circuit boards?
>>
>> Phil Nutting  |  HVP Development Engineer   |  Excelitas  
>> Technologies Corp
>>
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