# About the Ask Me Anything category

**URL:** <https://sierraconnect.protoexpress.com/t/about-the-ask-me-anything-category/313>\
**Category:** Ask Me Anything\
**Created:** [November 6, 2023, 7:42pm UTC](https://sierraconnect.protoexpress.com/t/about-the-ask-me-anything-category/313 "2023-11-06T19:42:56Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![lucy.sierracircuits](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/lucy.sierracircuits/32/8_2.png) [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\
**Post date:** [November 6, 2023, 7:42pm UTC](https://sierraconnect.protoexpress.com/t/about-the-ask-me-anything-category/313/1 "2023-11-06T19:42:56Z")

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Ask your design, fab and assembly questions to PCB experts every week with our Ask Me Anything sessions.

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**Author:** ![davy.baker1](https://avatars.discourse-cdn.com/v4/letter/d/ad7895/32.png) [@davy.baker1](https://sierraconnect.protoexpress.com/u/davy.baker1)\
**Post date:** [January 6, 2025, 8:41pm UTC](https://sierraconnect.protoexpress.com/t/about-the-ask-me-anything-category/313/2 "2025-01-06T20:41:46Z")

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How much does the cost to fab a PCB go up if “blind vias”(one side visible, the other not) are added to the normal through hole via type ?

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**Author:** ![lucy.sierracircuits](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/lucy.sierracircuits/32/8_2.png) [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\
**Post date:** [January 6, 2025, 9:42pm UTC](https://sierraconnect.protoexpress.com/t/about-the-ask-me-anything-category/313/3 "2025-01-06T21:42:55Z")

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Hi Davy,

So I asked our sales people and they unfortunately cannot answer this. They say our systems are set up with pre-determined formulas to set the price, and look at the whole build files. This is too difficult to answer without seeing the files.

Is your design ready?

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**Author:** ![steve.carney](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/steve.carney/32/50_2.png) [@steve.carney](https://sierraconnect.protoexpress.com/u/steve.carney)\
**Post date:** [January 6, 2025, 10:30pm UTC](https://sierraconnect.protoexpress.com/t/about-the-ask-me-anything-category/313/4 "2025-01-06T22:30:06Z")

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Can’t give an actual cost but just adding blind vias on the outer layers is pretty simple and shouldn’t add too much. An example would be connecting layers 1&2 and 7&8 on an 8 layer single lamination job. If you need to fill plated that’s a different matter.