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 !

Stiffeners & Busbars

 Formed Busbar Fabricator - Custom Copper Busbar Supplier | E-Fab, Inc.

BGA SWITCH-A-PITCH ADAPTERS - ARIES

 BGA Switch-A-Pitch Adapters - ARIES Link

Convert 0.4mm and 0.5mm pitch footprints to 1mm or 1.27mm pitch 

That's it !

Educating the Customer

Here is a link to some good reading for PCB Stackup and Controlled Impedance.

https://randy-clemmons.blogspot.com/search?q=glass

That's it !