1. Use: Used in PCB/FPC drilling hole;
2. pcb drill sizes: 2.0, 2.5, 2.6, 2.7mm ±0.15mm;
3. Specification: 37”*49” (940mm*1245mm), 41”*49” (1041mm*1245mm), 43”*49” (1092*1245mm);
4. Warpage: ≤0.6%;
5. Density: 980±30%kg/m³;
6. Surface Hardness: 80±5N/mm2 (Shores D)
drilling pcb development
Recent developments into miniaturizations have been a major . cause of the great momentum in the electronic industry’s expansion. As miniaturization continues to propel the industry, fabricating electronics. and manufacturing PCBs is becoming challenging. The most challenging aspect of PCB fabrication is the incorporation of high-density vias. and through holes used as interconnects. The through holes used to mount the electronic components, which make up the circuits.
As the packing density of the through holes in the PCB assembly line increases. the demand for smaller holes increases . Two main technologies. that used to produce accurate and repeatable holes of microns in diameter. are mechanical drilling and laser drilling. The through hole diameters can range from 50-300 microns. and run about 1-3 mm deep using these PCB drilling techniques.
To maintain accuracy at high speeds, the spindle makes use of an air bearing and a direct drill bit assembly. which held by a precision collet chuck. Additionally, the vibration of the tip of the bit controlled within a 10-micron range. To maintain the exact position of the hole on the PCB, the drill mounted on a servo table. which controls the motion of the table on the X and Y-axes. A tunnel actuator used to control the motion of the PCB in the Z-axis.
As the pitch of the holes in the PCB assembly line is decreasing. and the demand for higher throughput is increasing. the electronics to control the servo may lag behind at some point. The use of laser drilling to create through holes for manufacturing PCBs. helps reduce or drop this lag and is the next generation’s need.
The size (diameter) of the hole to drilled in the PCB controlled using the aperture of the setup. and the depth of the hole controlled by the time of exposure. Also, the beam split into various energy bands. to further provide control and precision. A moving focal lens used to concentrate. the energy of the laser beam exactly at the drilling location. A Galveno-sensor used to move and position the PCB with high speed and accuracy. Galveno sensors capable of switching at speeds of 2400 KHz are. currently used in the industry.
Additionally, a novel method known as the direct exposure technique. can also used to drill holes in the circuit board. This technique based on the concepts of image processing. where the system increases the accuracy. and speed by creating an image of the PCB and converting that image into a position map. The position map is then used to align the PCB under the laser for the drilling process.
Advanced research in image processing algorithms and precise optics will further. improve the throughput and yield of PCB fabrication. and high speed drilling used in the process.
drilled pcb sheet material
Printed circuit board is the most important part of electronics. , the acronym has also accounted for printed wiring boards. and printed wiring cards, which are the same thing. Due to the crucial role of these boards in everything from computers to calculators. PC board material selection. should be undertaken with care. and knowledge for electrical necessities of a given piece of equipment.
Before the development of the PCB. circuit board materials covered by nests of entangled. overlapping wires that could fail at certain junctures. They could also short circuit once age took hold and certain wires started to crack. As could expected. the manual process that went into the wiring of . these early boards was confusing and painstaking.
As an increasing variety of everyday. electronic components began to rely on circuit boards. the race was on to develop simpler. more compact alternatives, and this led to the development of the material, PCB. With PCB materials, circuits can routed between a host of different components. The metal that facilitates the transfer of current between the board. and any attached components known as solder. which also serves a dual purpose with its adhesive qualities.
PCB generally consists of four layers. which are heat laminated together into a single layer. The material used in PCB from top to bottom includes Silkscreen, Soldermask, Copper. and Substrate.
The last of those layers, substrate, made of fiberglass and is also known as FR4. with the FR letters standing for "fire retardant." This substrate layer provides a solid foundation for PCBs. though the thickness can vary according to the uses of a given board.
A cheaper range of boards also exist on the market that don't use the same remove PCB materials. but instead consist of phenolics or epoxies. Due to the thermal sensitivity of these boards, they tend to lose their lamination . These cheaper boards are often easy to identify by the smell they give off when soldered.
PCB second layer is copper. which laminated onto the substrate with a mixture of heat and adhesive. The copper layer is thin, and on some boards there are two such layers - one above and one below the substrate. PCBs with only one layer of copper tend to used for cheaper electronics devices.
The massively-used copper clad laminate (CCL) can classified into different categories. according to different classification standards including reinforcing material. used resin adhesive, flammability, CCL performance. The brief classification of CCL shown in the following table.
china pcb backup material factory - YUESHAN
Yueshan is a competitive China medical pcb back up board sheet material. and entry board frequency china OEM manufacturer, supplier. and vendor. you can get quick turn medical pcb board frequency china production. and samples from our factory.
We work with top PCB laminate providers to bring you a wide range of material options. such as enhanced epoxy laminates, ultra-low moisture materials, high-frequency ceramic filled laminates. UL 94V-0 rated, RoHS compliant, and more. Your choice of laminate material will depend on your design and application. If you need help selecting your printed circuit board laminate material. and have questions about cost, leadtime. or availability, please contact us.
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