How PCB is Made in China - PCBWay - Factory Tour

from last four years I am making hundreds of electronics projects in almost every electronics project I have used PCBs but this time we are going to China to a city called Shenzhen to show how PCBs are actually made and thanks to PCB way for inviting us there after we make a PCB order in their website first engineers inspect or uploaded PCB file the conducts rdf em review by checking the trace widths the space between the tresses hole size etc and ensure that design is error-free and fits within manufacturing capabilities after checking several circuits that combine them on a large production panel which is much more efficient to handle to the factory thus the production costs also decreases first the board is dry-cleaned in a machine and then gutted and small pieces which is suitable for manufacturing [Music] after cutting the board's they come to the drilling room drilling is done for two purposes for connecting the laded components and for the via holes that link the copper layers together first the operator takes a MDF board as exit material then he loads one or more PC panels and place it on the machine and finally adds a sheet of aluminium as entry foil those machines are computer-controlled after selecting the right drill program the machine starts working drill change is fully automatic the machine selects the drill to use from the drill rack and checks that it is the correct size and then loads it into the drill head this is a year driven drill which can rotate up to 150 thousand revolutions per minute the high speed drill makes the whole walls cleaner after that the corners are trimmed to make it round it then the surface is clean [Music] the machine automatically smooths the edges of the board one side at a time [Music] [Applause] [Music] [Applause] [Music] as the board has drilled for making connection between top and bottom there but the middle there is non conductive fiberglass so to make connection between top and bottom there the board comes for electroplating the operator loads the panels on to the flight bars the panels themselves act as cathodes for electroplating the panels are carried through a series of chemical and rinsing baths by the overhead crane this is a multi-stage process and everything is controlled by computer to ensure about one micron thick copper has deposited over the walls of the hole after that the board goes through a series of process where copper is plated up to a thickness depending on the required final finish for the panel this process took about 40 minutes of time and then board automatically goes to the another room for a next step to enter into this room we need to put on a special type of anti-static clothes and we need to pass through a dust cleaning chamber [Music] then manatees first coated with a layer of photosensitive film in the photoresist which is hot rolled onto the copper this machine do this automatically or sometimes down this process manually this film is blue light-sensitive so all the lights into the room is yellow so the light does not affect this film then the operator cleans the films the film is the one which already has printed circuit diagrams on it and loaded the first pill then put the laminated panel and finally the second theory after perfectly aligning both layers the board is sent to the printer the printer uses or for the UV lamps too hard and photosensitive film according to the circuit printed film so after this process only the circuit part is hardened and rest unwanted areas remain soft modern machine can do this whole process automatically next the board is processed through a chemical solution or developer that removes the unhardened and unwanted resist from areas that were not polymerized by light after this you can clearly see only the circuit is printed by blue resist and this material will resist the chemical at the etching process then the board is sent for the etching this process is to remove the unwanted copper using a powerful alkaline solution after etching the boards need to be cleaned and washed to remove the excess chemical solution then the boards come for automatic optical inspection or Aoi this machine enables fast and accurate inspection of PCBs to ensure that the quality of product leaving the production line is high and the items are built correctly and without manufacturing faults when detecting circuits the machine automatically scans the PCB through the camera collects images and compares the tested solder joints with the qualified parameters in the database [Music] when everything is okay then the board comes again to another yellow room for solder mask this coating machine simultaneously covers both sides of the panel with a box his holder masking sölden mask is required to protect the copper surface and prevents older short in between components during assembly after applying solder mask panels are now wrecked and put through a conveyance to dryer at 87 degree Celsius which hardens the resist just enough for the next stage [Music] usually it takes almost 25 minutes to bake solar mass is applied to all over the board so to remove the solder mask from solder pad first the operator takes the PCB and then align the photo film carefully at both sides simultaneously the UV lamp in the machine hardened the ink where the film is clear letter on the unhardened and unwanted resists are stripped off most PCBs have a component legend to show which component goes where they use in jet printers to image the legends direct from the board digital data this printer is very advanced the operator only needs to find the silkscreen file corresponding to the board and set the positioning on the main control computer then the inker will be applied on the boards evenly and automatically moreover it can also be printing and curing on the same system to protect the copper of solder pad from oxidation hot-air solder leveling is often chosen as surface finish method for circuit boards in addition to the usual hasl they also provide a variety of surface treatment methods such as emotion gold heart gold and OSP for customers to choose according to their needs finally the PCB production process is done then they electrically test every multi-layer PCB against the original board data using flying probe tester that is the high voltage insulation and low resistance conduction of the circuit boards and check each net to ensure that the circuit is complete and there is no short or open circuit for high-volume production they use automatic test machine which saves time and money because it runs at a high rate after all testing the boats come into the milling room now it's time to separate all individual PCBs from the large production panel the operator loads one or more PCBs onto the CNC machine and choose the right program for those ports [Music] according to customer needs the board or array can also be be scored so that they can easily be broken apart after assembly after milling the board comes for cleaning this machine cleans dust and oil stains using ultrasonic waves after wet cleaning the boards are dried then a team of sharp-eyed inspectors give each PCB a final and careful check over she looks for any cosmetic defects like scratches and marking also checks aperture thickness holes etc after inspection the PCBs are vacuum sealed and bubble wrapped to keep out dirt and moisture then the packets come to the packing room after printing out the production release note PCBs are securely boxed inside form wrapper and at the end of the day courier comes and takes a package and delivers all over the world hope you have enjoyed this video this was a lot of fun and also I have learned a lot from them hope you have also learned something new so that's it for now see you in my next video until then bye bye

Channel: DD ElectroTech

Views: 4,020,191

Rating: 4.8110332 out of 5

Keywords: How PCB is Made, How PCB is Made in China, PCBWay, Factory Tour, PCB, homemade pcb, how to make pcb at home, printed circuit board, circuit board, factory, diy, circuit, electronic circuit, how to make pcb, how to make circuit board, china, shenzhen, factory tour, chinese factory, manufacturing, PCB manufacturing process, manufacturing process, printed circuit board fabrication, PCB making tutorial, pcbway factory, largest pcb factory, documentary on pcb

Id: _GVk_hEMjzs

Length: 13min 12sec (792 seconds)

Published: Sat Oct 27 2018

Reddit Comments

[u/Ktulu_wpg]

Nice video!