High CTI 600V PCB Built on 2.0mm FR-4 With HASL and Countersunk Holes

(Printed Circuit Boards are custom-made products, the picture and parameters shown are just for reference)

General Introduction

This is a type of single sided circuit board built on FR-4 substrate with CTI 600V. It is a 2.0mm thick PCB with simple tracks, green solder mask and white silkscreen. The surface finish on pads is hot air leveling, lead free type. There are 3 countersunk holes aligned on a track. The panel contains 12 individual boards.

PCB Specifications

Applications

PDP, LCD , TV

Refrigerator

Power supplier

Washing machine

What is Comparative Tracking Index (CTI)?

Here CTI is a quality item that refers to copper clad laminate which is widely used in home electrical appliance or other high-voltage (110V, 220V) electrical apparatus.It is a simulated condition that the PCB is polluted in its working environment, which result in leakage or short-circuit at the track gap of the PCB surface, being accompanied by heat releasing and charring.

The way of experiment is that continous 50 drops of 0.1% ammonium chloride solution are dropped between two points on the PCB surface,30 seconds per drop,turning on high voltage AC current to do the test. Firstly trying 300V to generate 1A current. There's ammonium chloride solution on the surface, so after current is switched on it will produce resistance who also bring out heat, then the solution is slowly evaporated. 2nd drop is on and till to 50 drops to see if the PCB has leakage or not. Once the PCB has 0.1A creepage and exceeds 0.5 seconds, it's judged Failure.

The quality of CTI of laminate refers to the externally applied voltage value and without failure of 50 drops. If abovementioned 300V passed, we can increase the voltage to 400V, 500V or 600V till to the high value before failure, that is the data of the laminite CTI.

Bicheng offers high CTI PCB's (high CTI 600V FR-4 and aluminum backed material) which is working in such harsh environment of high voltage, filth and humidity.

IEC 112 standard has 3 degrees as follows

As per the standard of IEC,the smaller a substrate of CTI grade, the better resistance to tracking. Normal FR-4 ranges 175-225V

Data Sheet of FR-4 with CTI 600V

Bicheng PCB Capability (FR-4) 2022

Company Profile

Founded in 2003, Shenzhen Bicheng Electronics Technology Co., Ltd is an established high frequency PCB supplier and exporter in Shenzhen China, severing cellular base station antenna, satellite, high frequency passive components, microstrip line and band line circuit, millimeter wave equipment, radar systems, digital radio frequency antenna and other fields worldwide for 18 years. Our high frequency PCBs are mainly built on 3 high frequency material brands: Rogers Corporation, Taconic and Wangling. Dielectric constant ranges from 2.2 to 10.2 etc.

Bicheng PCB is headquartered in Shenzhen, a city with great economic vitality. Based in China, we adhere to the philosophy of servicing small and medium sized companies offering variety of circuit boards to meet the demands of market.

Main Business & PCB Applications

We maintain the highest standards which support products that exhibit exceptional quality, performance and reliability. We also have divisions of FR-4 circuit board, flexible circuits and metal core PCBs featured as prototypes, small runs to mass production. We actively research and build such high value added PCB projects as HDI, quick turn, impedance control, heavy copper and backplane board etc. This has made our PCB products generate an effective prolongation and complementation, as well as formation of integrated products line ranging from low-end to high-end.The circuit boards are used in the industries of home appliances, portable and consumable electronics, medical filed, aerospace as well as telecommunications etc.

Main Material Partners