Pcbs In Cell Phones

Written by Volker Feyerabend

For most printed circuit board fabricators, drilling is a bottleneck. This comes despite improved automation and linear drives. Dual spindle technology is based on the concept that two spindles drill simultaneously on the same panel. Today’s panels contain multiple images of the same circuit – e.g., cellphones, other mobile equipment, USB sticks, or substrates. The number of individual circuits on a panel can be staggering. By drilling with two spindles at the same time, the drill time is divided by approximately two, therefore doubling throughput. PCB fabricators began experimenting with dual spindle technology about 20 years ago. Some German PCB manufacturers like Würth and Schweizer Electronic found new ways to increase productivity and increase production capacity without changing the floor footprint. Some drills of choice contained up to 80 spindles. But the spindle position could not be changed, and tolerances proved a real challenge. Over time, however, equipment manufacturers improved the technology and their machines (Figure 1) .

The Posalux machine (“PX”) contains two spindle drills on the same station, and drills on two independent X-axes with an accuracy of +/-15µm. It has full range linear spindles ranging from 200,000 to 300,000 rpm. The X- and Y-axes run with 3150" min and accelerate up to 12.0 m/s2, or 1.22g. The axis positioning accuracy is <+/-0.004", and tolerances are continuously checked during processing. The Z-axis acceleration rate is up to 4.1g, enabling hit rates of up to 850 strokes per minute. The depth control accuracy is +/-0.006". The software optimizes NC-part programs for dual spindle operation, improving the distance, number of hits and targets and drill wear (both spindles). The Korean PCB manufacturer evaluated process capability (cpk).

The global trading center of PCB will be in Shenzhen | Fully Hong PCB

Following the announcement to create a ‘virtual trade platform’, the Shenzhen e-commerce industry has begun to impact ‘the global PCB trading center’ target. According to the ‘2011 Platinum strategy to upgrade the press conference’ on Aug.31, noted that the global annual output value of 350 billion yuan, 450 billion yuan of total transaction value of the PCB industry, there are more than 20% of the purchase intent is a professional e-trading platform in Shenzhen released, which makes the PCB business entities because of the risk faced by the EIA, labor tensions, rising cost pressures showing the relocation trends, Shenzhen or may become a global trading center of PCB. PCB assembly for electronic parts is the substrate, known as the ‘mother of electronics products,’ people daily contact with computers, cell phones, television, or even a microphone and other electronic products have PCB inside.China’s PCB production value had already surpassed the United States in 2006, more than Japan, China’s PCB output value ranked first in the world. The number of PCB enterprises in the Pearl River Delta and the value is more than the same industry for more than 50% of which, the number of PCB enterprises in Shenzhen and the Pearl River Delta region accounted for output of the PCB industry, 78% and 82%. However, the PCB industry concentration is not high, there are companies of various sizes, low value-added production, environmental protection measures not in place based on land, water, electricity, rent, labor prices, and tighter environmental policies such as pressure, PCB manufacturing industry is accelerating the shift from a trend out of Shenzhen, but many are the R & D headquarters information center to stay in Shenzhen, manhole area is concentrated area.

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