Technical process of high density PCB horizontal electroplating

With fast development of microelectronic technique,the PCB manufacturer trend to developing of multiple stratification fictionalization and integration. Smaller holes and thinner lines were adopted in circuitous pattern of designing,so that is great difficulty for PCB manufacturing. Especially for multilayer PCB,when the aspect ratio is above 1:5 and adopted plenty of blind holes,the traditional vertical electroplating machine can not to meet the high quality and reliable requirements.so the horizontal electroplating machine was broke upon.

The principle of horizontal and vertical are the same,but the functions of horizontal is better. Both of them have two poles, cathode and anode. After switching on the power,positive ion was moved to electrode rection of negative and negative ion forward to electrode rection of positive.then produced metal deposition and gas.

The basic structure of electroplating system:

According to the features of horizontal electroplating equipment, that is adopted roller with electric conduction,each roller was installed spring device to adjustment for different thickness of PCB. The flow of the electroplating liquid was by system of combing motor pump and jet nozzles.The electroplating liquid was flowed up and down in the sealed tank and vertical praying to PCB. On the PCB surface，It generated eddy quickly. Otherwise,the equipment have filter system with mesh 1.5µm to leach the deburrs.When manufactured the horizontal electroplating system, we must considered setting operation and technical parameters. In practice, the transfer speed,motor pump,nozzles,electric current would be tested and adjusted accord to the specification of PCB.

Horizontal electroplating technology is not accidental event. However, it is an inevitable result for developing of high density,high precision,multifunction of multilayer PCB.The benefit of horizontal electroplating equipment is that can provide reliable good quality of products and achieve mass production.