OPT3001-Q1: OPT3001-Q1 layout problem

Mason Liu

Part Number: OPT3001-Q1

Hi,

In the OPT3001-Q1 datasheet, there two pictures about layout, i'll show them below.

my question is:

1.what's the difference between these two layout? one is solder mask and the other is solder paste? how to understand it?

2.picture 1, in the red circle, does it means that solder pad is bigger than pin about 0.07mm? does it necessary?

Thanks.

Best regards

Mason Liu

over 5 years ago

0 Alex Bhandari-Young over 5 years ago

TI__Mastermind 25845 points

Hi Mason,

1) The first is the board layout example (PCB footprint) and the second is the stencil example (see headings at the top right).

2) Non solder mask defined means there is a gap between where the solder mask ends and the pad starts. This gap is what is being described here. So no this does not mean pad is bigger than pin by that number.

Let me know if you still have questions here.

Best,

Alex

0 Mason Liu over 5 years ago in reply to Alex Bhandari-Young

TI__Expert 4035 points

Hi Alex,

Thanks a lot for answering me, i still have a little question, what is stencil example use for?(for example, i know board layout example can be used in PCB). how to differentiate these two types?

Thanks.

Best regards

Mason Liu

0 Alex Bhandari-Young over 5 years ago in reply to Mason Liu

TI__Mastermind 25845 points

Hi Mason,

Stencil is used in manufacturing when solder paste is used and the manufacturer wants to use a stencil to deposit the paste on the PCB.

Best,

Alex

0 Mason Liu over 5 years ago in reply to Alex Bhandari-Young

TI__Expert 4035 points

Hi Alex,

So, in other words, when i do the layout in PCB, i don't need to concern stencil because it is a manufacturing thing? am i right?

Thanks.

Best regards

Mason Liu

0 Alex Bhandari-Young over 5 years ago in reply to Mason Liu

TI__Mastermind 25845 points

Correct.

Best,

Alex

0 Mason Liu over 5 years ago in reply to Alex Bhandari-Young

TI__Expert 4035 points

Thanks a lot for helping me.

Best regards

Mason Liu

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OPT3001-Q1: OPT3001-Q1 layout problem