Licky's Column

What is the differences between COB and SMD

by Licky Li

What is the differences between COB and SMD

What is the differences between COB and SMD: COB package is Chip Onboard, which is to stick bare Chip On the interconnect substrate with conductiv...
Posted in PCB, PCB design

Honey drone

by Licky Li

Honey drone

Posted in DIY kit, PCB design, PCB fabrication, pcba

Embedded system, what do you mean?

by Licky Li

Embedded system, what do you mean?

Technology continues to develop, every year and even months there must be the latest technological discoveries from researchers from technology com...
Posted in Aluminum enclosure, Aluminum Printed Circuit Board, HDI PCB, PCB design, PCB fabrication, pcba

3 Steps to determine / calculate number of PCB layers

by Licky Li

3 Steps to determine / calculate number of PCB layers

STEP 1: Choose initial number of layers 1 or 2 Layer PCBs – Home prototypingUse 1 or 2 Layer PCB only for very simple boards, breakouts or for som...
Posted in HDI PCB, PCB, PCB design, PCB fabrication, pcba

Blind vias VS Buried Vias

by Licky Li

Blind vias VS Buried Vias

Blind and buried vias are only available on boards with at least four layers. Unlike regular vias on a two layer board which connect the two surfac...
Posted in HDI PCB, PCB, PCB design, PCB fabrication

What is ball grid array (BGA)?

by Licky Li

What is ball grid array (BGA)?

A ball grid array (BGA) is a type of surface-mount packaging used for integrated circuits. BGA packages are used to permanently mount devices such ...
Posted in BGA, HDI PCB, PCB, PCB design, PCB fabrication, pcba

Which Surface Finish is Right for Your PCBs When Lead-Free Requirement Weighs?

by Licky Li

Which Surface Finish is Right for Your PCBs When Lead-Free Requirement Weighs?

Lead-free PCBs (Printed Circuit Boards) were first called for just for the compliance of ROHS (Restriction Of Hazardous Substances) by EU (Europe ...
Posted in PCB, PCB design, PCB manufacturing, pcba

10 golden rules of PCB design

by Licky Li

10 golden rules of PCB design

Rule 1: Choose the right grid-set and always use the grid spacing that matches the most components.  Rule 2: Keep the path shortest and most direct...
Posted in PCB, PCB design, PCB layout, PCB manufacturing

What is DRC PCB ?

by Licky Li

What is DRC PCB ?

What is DRC PCB? DRC PCB is a set of rules adopted by PCB designers. It helps to verify their schematic matches the manufacturing considerations ...
Posted in PCB, PCB design, PCB fabrication, PCB layout, PCB manufacturing

The Fundamental Analysis of QFP vs QFN Packages

by Licky Li

The Fundamental Analysis of QFP vs QFN Packages

QFN package QFN (quad flat no-lead) package is a semiconductor set connecting ASCIC to Printed circuit board (PCB). To achieve this, QFN utilizes S...
Posted in package, PCB design, PCB fabrication, PCB Layer stack-up

How To Create PCB For Drone

by Licky Li

How To Create PCB For Drone

 Creating the drone shape in AutoCAD and importing to EasyEDA and balancing the weight of the components along the PCB.
Posted in HDI PCB, MCPCB, PCB, PCB design, PCB fabrication, pcba

How to Cover Vias With Solder Mask in Eagle

by Licky Li

How to Cover Vias With Solder Mask in Eagle

When designing a 2 layer PCB we can connect the wire that are on the top layer and the bottom layer. The wire that connects between the top layer a...
Posted in HDI PCB, PCB, PCB design, PCB fabrication, pcba