GLOBAL CIRCUIT(SHENZHEN)CO.,LTD
Full feature custom PCB&PCBA services.
Centroid is the special file for SMT assembly used for quickly programming the SMT machines. This is also known as Insertion, Pick-N-Place, or XY Data. This files may be automatically generated by some of CAD tools,or,you need to modify the file and then export the Centroid file. The Centroid file describes the position and orientation of all the surface mount parts, which includes the reference designator, X and Y position, rotation and side of Board (Top or Bottom). Only surface mounting parts are listed in the Centroid.
The same Gerber files in format of RS-274X that you send to us for your PCB fabrication will be required to assemble your boards. As a minimum request, PCB assembler needs the files of three layers: Silkscreen, Copper (Track) and Solder Paste. So please make sure that all these files have been included and reviewed at your side. Of course we will also review your files before assembly starts to make sure all the information is complete and accurate for assemblies.
In order to properly assembly your PCB,It is strongly suggestion that you send to us your all other relevant documents or information,which those of files may include your assembly drawings,special assembly insttuctions,and even images or pictures of your work.These information helps us better understand your assembly needs, correcting some ambiguous or even mistaken placements, and ends up with an excellent job.
SMT machine setup and operation should properly requires components overcommit. For The unused and excessive parts supplied by you or purchased by us which will be packaged and returned to you together with the finished PCBA boards. SMT components which are not supplied on reels should be on one continuous strip of tape.
If your have different PCBA work need to assemble the same SMT components, do not cut them into strips, please keep them in the continuous strip of tape or on the reels.
Resistors, Capacitors, Diodes (0603, 0805, 1206, 2225, SOT, SOD, MELF - packages) has require a minimum of 50 pieces and have to exceed the required quantity by 30 pieces. (e.g.: assemble quantity 40 pieces – we will need 70 pieces – this meets our minimum of 50 pieces plus 30 pieces over assemble quantity).
Resistors, Capacitors, Diodes (0201, 0402, miniMelf, miniature packages) require a minimum of 100 pieces have to exceed the required quantity by 50 pieces. (e.g.: assemble quantity 80 pieces – we will need 130 pieces- this meets our minimum of 100 pieces plus 50 pieces over assemble quantity).
A small number of excess(1-5 pieces based on the total quantity of assemblies) is requested for expensive parts such as IC, BGA, QFP, Connectors, etc.
Ensure that smoothly assembling and shipping your PCBA on time.Please send more extra or contact us for answers,if you have any question or doubt,.
If your PCB dimension is smaller than 50mmx100mm, or if your PCB is of any shapes (circular, or odd shape) other than rectangle, your boards must be panelized in an array for assembly. As we also fabricate your PCB for you, so once we start fabricating your boards we will have the panelization file (solder paste data), we will transfer the data to PCBA department to create the stencil to match the panelized PCB.
If the clearance between the board’s edge and copper features is less than 3.5mm (138mil), or your boards need to be panelized for some reason, Break-away rails (Break-away tabs) must be added at the two longer paralleled edges of the boards to ensure that the boards can be assembled by the machine.
Various testing method will be applied to the assembled boards before the final shipment:
Global Circuit's production facilities are ISO9001 certified to ensure we go beyond your expectations.
Our list of printed circuit board assembly capabilities allows our PCB customers to have the convenience of a “One Stop Solution” for their manufacturing and assembly needs.
As one of the most cost-effective and high quality PCB fabricator and PCBA service provider, we are having 100+ new engineers using our services for their research work. We are answering questions from around the world on the daily basis concerning their PCB and assembly business. We aggregate these questions for our new customers to know about our product and service.
Global Circuit (Shenzhen) Co Ltd is a manufacturer of printed circuit boards (PCBs) in mainland China since 1995. Our services cover rigid PCBs, flexible PCBs, and SMT. If you need HDI PCBs, we are one of the few mainland China manufacturers that can deliver. Global Circuit has about 600 staff in its factory located in Shenzhen, China, with a capacity of 20,000 square meters (around 200,000 square feet) per month.
Yes,But,It is proposal that we offer the PCB fabrication, parts sourcing and PCB assembly in a continuous and smooth manner to save our customer’s time and money.
We need the PCB files (Gerber files/other PCB files, etc.,) , Centroid (Pick & Place PNP file, or XY Data or files in other formats), BOM, and all other necessary data or documents/images/photos are complete for our assembly work.
Centroid is the special file for assembly used for quickly programming the SMT assembly machines. This is also known as Insertion, Pick-N-Place, or XY Data. Some of the CAD tools will automatically generate this file and some not, but you may need to modify the file and then generate the Centroid file. The Centroid file describes the position and orientation of all the surface mount parts, which includes the reference designator, X and Y position, rotation and side of Board (Top or Bottom). Only surface mounting parts are listed in the Centroid.
We hope you can mark on any individual package or box with the corresponding line number on BOM, manufacturer’s part# or customer’s part#, quantities. A detailed packing list is preferred to enable us to count and check upon receipt of your parts.
Yes. This practice is called partial Turn-key. You can supply some parts, and we source the rest of the parts on your behalf. We will ask for your approval for anything that is not sure at our side. In case parts crossing or substitution is needed, we will again ask for your final approval.
Yes, We have the ability to handle 0.25mm pitch BGA with X-ray testing. For BGAs, we need to tent any vias under the BGAs with solder mask to ensure the soldering quality.
Excessive parts do exist because we will ask for some percentage of overage for consigned/kitted orders, or we will buy more for the same purpose for those of Turn-key orders.For the unused parts, you can either ask us to ship them back to you together with your PCBA, or keep them in our warehouse for your next order. It is up to you.
In order to start your PCBA work,please send to us the following files in proper format via email at sales3@chinaglobalcircuit.com.Please get ready your BOM files, Gerber files and Centroid files for your PCBA service. BOM for Turn-key,promgramming & testing files and partial Turn-key may contain a little more information that the one for consigned/kitted. Please check in detail.
Yes
1)Panelization is needed when your PCB dimension is smaller than 50mmx100mm, or when your PCB is of any shapes (circular, or odd shape) other than rectangle, your boards must be panelized in an array for assembly.
2)PCB assembly witn panelization is aim to improve production efficiency and reduce production costs
1)You should feedback and decription for the defects via online or email,
2)It will be appreciated if you can send back to us some of the defective PCBs for problems analysis.
3)In response to your feedback issues, we will ask relevant departments to set up research groups and hold conferences for which analyze, discuss and put forward corresponding measures.
IPC-A-610 Class 2.
As we need to source all the parts for Turn-key orders, the turn time largely depends on how quick we can get all the parts. We will let you know through everyday email communications. Before all parts are ready, we will fabricate the PCBs and start to make the stencil so that we can start assembly immediately after we get the parts.