Lily's Column

2 Layers Impedance Design

by Lily Zhang

2 Layers Impedance Design

100 ohm differential impedance recommended design Ground package design: line width/spacing 7/5/7mil ground wire width ≥20mil signal and ground wi...
Posted in Impedance, Impedance Control PCB, PCB design, PCB Impedance Matching

Impedance Matching in PCB Design

by Lily Zhang

Impedance Matching in PCB Design

Impedance Matching in PCB Design It is fair to consider a PCB itself as a component in which multiple traces are connected. Each trace is different...
Posted in Impedance, Impedance Control PCB, PCB design, PCB Impedance Matching

How to Reverse Engineer a Schematic From a Circuit Board

by Lily Zhang

How to Reverse Engineer a Schematic From a Circuit Board

This project is a result of needing to service a domestic electronic item without being able to obtain a circuit diagram.The process proved to be v...
Posted in PCB, PCB design, PCB fabrication, reverse engineer, Reverse Engineering

What is a capped via hole?

by Lily Zhang

What is a capped via hole?

A capped via is when plating is added over the via hole so that the surface is fully metalized with a minimum copper / cap plating thickness of 5um...
Posted in PCB, PCB design, PCB fabrication, PCB layout, PCB manufacturing

PCB Reverse Engineering

by Lily Zhang

PCB Reverse Engineering

PCB reverse engineering entails getting the internal structure and all layers connections by either non-destructive process or destructive process ...
Posted in PCB design, reverse engineer, Reverse Engineering

Manual PCB Reverse Engineering Process

by Lily Zhang

Manual PCB Reverse Engineering Process

At times, advanced techniques of reverse engineering PCB are time-consuming and expensive. In practice, most PCB reverse engineers undertake manual...
Posted in PCB design, PCB layout, reverse engineer, Reverse Engineering

PCB Impedance Design

by Lily Zhang

PCB Impedance Design

It is suitable for most PCB suppliers’ process standards and PCB board design with impedance control requirements. 1). 2 Layers Impedance Design 10...
Posted in Impedance Control PCB, PCB, PCB design, PCB fabrication, PCB Impedance Matching

How to make PCB with blind hole

by Lily Zhang

How to make PCB with blind hole

The use of blind holes and buried holes is an effective method to increase the density of multilayer boards, reduce the number of layers and board ...
Posted in PCB, PCB design, PCB fabrication

Common Gerber files Problems and how to fix them?

by Lily Zhang

Common Gerber files Problems and how to fix them?

The most common problems seen in Gerber files include design mismatch, insufficient clearances, obsolete file formats, unregistered layers, and inc...
Posted in PCB, PCB design, PCB fabrication, PCB layout, PCB manufacturing

Staggered Microvias and Stacked Microvias PCB

by Lily Zhang

Staggered Microvias and Stacked Microvias PCB

What are staggered vias? Staggered vias connect different layers of the board but do not come in direct contact with each other (separate drill axi...
Posted in PCB, PCB design, PCB fabrication

HDI board stack-ups

by Lily Zhang

HDI board stack-ups

HDI board stack-ups High-density interconnect, or HDI, circuit boards are printed circuit boards with a higher wiring density per unit area than tr...
Posted in PCB, PCB design, PCB fabrication, PCB Layer stack-up, PCB layout, PCB manufacturing

How are multilayer circuit boards made?

by Lily Zhang

How are multilayer circuit boards made?

Step 1: Inner layer core selection PCB core material The stack-up designates the materials to be used for the manufacture of a multilayer circuit...
Posted in PCB, PCB design, PCB fabrication, PCB Layer stack-up, PCB layout, PCB manufacturing