OPT3002: Washing/cleaning after reflow

Todd Keaffaber

Part Number: OPT3002

Hello,

We have designed in the OPT3002 for a battery operated sensor. After reflow we clean the boards with ultrasonic cleaning and detergent (Detergent 8) and then rinse with isopropanol and let dry. This process is causing some of the sensors to fail. My question is what wash procedure is acceptable for OPT3002? Are there any restrictions I should be aware of?

The datasheet stated washing with isopropanol was acceptable. Any guidance will be appreciated.

Thanks,

Todd

over 5 years ago

0 Alex Bhandari-Young over 5 years ago

TI__Mastermind 25815 points

Hi Todd,

Recommendations are in OPT3002 datasheet: section 12.1 Soldering and Handling Recommendations, and section 8.2 Do's and Don'ts
also see www.ti.com/.../slua271a.pdf specifically section 5.2 Solder Reflow and 5.3 PCB Cleaning

Isopropyl alcohol should not be a problem as far as I know. Are you seeing the failures only after cleaning or could it also be caused during reflow? What is the failure case?

Best,

Alex

0 Todd Keaffaber over 5 years ago in reply to Alex Bhandari-Young

Prodigy 70 points

Hi Alex,

Thanks for the quick response. As far as I can tell we are following the right procedures as described in the data sheet and appnote.

We are still trying to figure out the root cause of the failure. However, the new element of our process was the cleaning so I wanted to confirm that we weren't doing things incorrectly in the wash.

Thanks,
Todd

0 Alex Bhandari-Young over 5 years ago in reply to Todd Keaffaber

TI__Mastermind 25815 points

Hi Todd,

Does this answer all your questions? Is it okay to close the thread?

Best,

Alex

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OPT3002: Washing/cleaning after reflow