How Solder paste Volume/Area is calculated for the produce.

How Solder paste Volume/Area is calculated for my product. | 20 May, 2021

My product has 2.4Mil and 3.1Mil stencil.

For both the stencil my SPI specification is set as 30% to 160%

How this is calculated. Can anyone enlight me.

Solder Paste type 5.

Minimum opening is 0.16*0.18mm in stencil.

How Solder paste Volume/Area is calculated for my product. | 21 May, 2021

The thinner the stencil the bigger the variation in terms of percentage. Most probably it was experimentally established, rather than calculated.

How Solder paste Volume/Area is calculated for my product. | 29 May, 2021

Thanks, I do observed more solder paste terms of percentage in 0.06mm stencil than in 0.08mm stencil.

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