How to Select PCB Copper Thickness
February 27, 2026
1. What is copper foil? Copper foil is a thin, continuous metal sheet. It is an electro-deposited, negative-type material. The foil is plated onto the base of the…
FLJ resources
Uncategorized
Practical guides to PCB design, materials, manufacturing and assembly. Explore the details that matter before your next build.
Latest engineering guides
Showing 25–36 of 45 articles
PCB Cleanliness Standards for Medical Electronics
February 25, 2026
Cleanliness is not only for devices used in medicine. In fact, avoiding things like ionic contamination during the manufacture and assembly of circuit boards for medical electronic devices…
Common Problems in FPC Circuit Design
February 2, 2026
FPC Circuit Design — Common Problems I. Overlap of Pads II. Misuse of Graphic Layers III. Random Placement of Silkscreen Text IV. Hole Size Setting for Single-side Pads…
PCBA Purchasing Cost Analysis and Price Variance Method
January 29, 2026
When we analyze procurement costs using a procurement cost index and by looking at related commodity prices, the main goal is to see, at the company level, whether…
PCB Thermal Management — Cooling and Heat Design
January 19, 2026
For people, a body that is too hot makes them sick. For electronics, parts fail when they get too hot. Their reliability drops. So, it is very important…
PCBA Manual Soldering Best Practices
January 15, 2026
Introduction PCBA stands for Printed Circuit Board + Assembly. It refers to the full process where a bare PCB undergoes SMT (Surface Mount Technology) placement or through-hole (DIP)…
Thermal Design of LED Aluminum PCBs
December 26, 2025
Introduction A light-emitting diode (LED) is a solid-state semiconductor device that converts electrical energy into light. Compared with traditional incandescent lamps, LEDs have many clear advantages. These advantages…
Complete PCB Design Workflow: From Schematic to Gerber Files
December 25, 2025
Step 1 — Choose the right EDA tool The EDA tools I know that many people use are Altium Designer, Mentor PADS, and Cadence (OrCAD and Allegro). I…
About PCB Drill Compensation
December 19, 2025
There are no great individuals, only great teams. With the team working together, the first-stage PCB CAM automation project for net handling and drill handling is done. Next,…
PCB Testing Items in PCB Manufacturing
December 18, 2025
Printed Circuit Boards (PCBs) are the foundation of modern electronics, from consumer gadgets to critical aerospace systems. As devices become more complex and compact, the margin for error…
PCB Stack-Up Design to Reduce EMI
November 4, 2025
Introduction The information age is here, and PCB use keeps growing. PCB designs are getting more complex. As electronic parts are placed closer together on PCBs, electrical interference…
What Considerations To Make Multi-layer PCBs
October 28, 2025
Before releasing a multilayer PCB for fabrication, agree the process route, material specification and handling conditions with the fabricator. This article covers those manufacturing preparations. For estimating the…