Solder Mask

PCB Solder Mask | Printed Circuit Board Manufacturing | MADPCB

6 Common Solder Mask Errors in PCBs | Sierra Circuits

Exploring Paste Mask & Solder Mask in Your PCB Footprint - Altium YouTube

Hard Gold Plating

IPC Class 1 and 2: 30u” over 100u” nickel

IPC Class 3: 50u” over 100u” nickel

Source:  Your Trusted Hard Gold Plating PCB Manufacturer-Venture Electronic

PCB Layout Check List

 See: https://www.911eda.com/pcb-layout-checklist/

Megtron - Panasonic

 https://industrial.panasonic.com/ww/products/pt/megtron

Microvias - Types and Sizes

Source: Microvias in Advanced PCB Designs | Advanced Circuits

Source: Guide to Sizing and Using Microvias in HDI PCB Design | NWES Blog

45 Degree Angle Routing - Why

Why is there such a strong preference for 45 degree angles in PCB routing?

That's it !

Comparator with Hysteresis Reference Design - Texas Intruments

"Comparators are used to differentiate between two different signal levels. For example, a comparator may differentiate between an over temperature and normal temperature condition. Noise or signal variation at the comparison threshold will cause multiple transitions. Hysteresis sets an upper and lower threshold to eliminate the multiple transitions caused by noise."

Source: 

Comparator with Hysteresis Reference Design  - Texas Instruments

CAD/EDA/3D Conversions - Numerical Inovations

Convert DXF, GDSII, Gerber, Postscript, PDF, ODB++, TIFF & more. – Numerical Innovations, Inc.

That's it !