PCB Assembly Design Notes & Capability

PCB Assembly Process

The PCBA process is a combination of the SMT process and the DIP process. The PCBA process involves processes such as carrier board, printing,
patching, reflow soldering, plug-in, wave soldering, testing and quality inspection. Please refer to the following PCBA process flow chart for details.

01 Ordering a Board

02 DFM Check

03 Incoming Quality Control(IQC)

04 Machine programming - Gerber / CAD to Centroid / Placement / XY file

05 Solder Paste Printing

06 Component Placement

07 Pre-Reflow Automated Optical Inspection (AOI)

08 Reflow Soldering

09 Post-Reflow Automated Optical Inspection (AOI)

10 Conformal Coating

11 Final Inspection and Functional Test

12 Washing and Drying

13 Packing and Shipping

PCB Assembly Capability

Our state-of-the-art assembly equipment enable us to meet all your PCBA needs under one roof in an inexpensive way.
Please contact us at service@jrpanel.com, we will respond if we can do or not within 24 hours.

Flexible PCB Assembly Service


PCB Fabricating Flexibility		We are able to fabricate 1-6 layers PCB, if your PCB technology is beyond our manufacture capacity, it will be outsourced to our partner stability factory with high quality.
Part Supply Flexibility	Turn-key	We source all components for you from authorized components supplier or distributors.
	Partial Turn-key	Customer offer partial of components as they prefer and we will source the rest as required.
	Consigned	Components can be supplied by the customer,we accept parts in Reels, Cut Tape, Tube & Tray, Loose Parts and Bulk
Assembly Flexibility	Assemble Type	SMT, THT & Hybrid, single or double side placement.
	Stencils	Offer Laser-cut stainless steel stencil.
	Solder Type	Offer both lead & lead-free (RoHS Compliant) assembly services.
	Board Type	Rigid board, flex board, rigid-flex board, Aluminum board
	PCB or Panel Size	Min board size of 1010mm, will be panelized to suit the SMT machine Max board size of 330530.
	Board Shape	No restrictions for rectangular, Circular and any Odd Shapes, will adjust the panelize for better placement.
	Components	Passive components as small as 01005, 0201,0402; Active components from 0,25mm pitch; BGA above 0,25mm pitch,Package on Package; Cable & wire
Volume Flexibility	Prototype	MOQ as low to 5units in 1-2 days delivery
	Low Volume	Offer 3-4 days quick turn time service for low volume.
	High Volumn	Offer accurate delivery to catch your deadline.

Comprehensive Quality Assurance


Production Facilities Certification	ISO9001 Certified
Inspection	IPC610－D Test specification
Pass rate	≥99.5%
Quality Complaint Rate	≤ 0.1%
Repair & Rework	BGA reballing service acceptable
Advance Testing Equipment
Visual Inspection	General quality check
AOI Testing	Checks for soldering effect, missing component or polarity
X-ray Inspection	Checks for BGAs, QFN and bare circuit boards
KIC Temperature Test	Furnace temperature controlled within ±0.1℃
ICT Testing	In-Circuit Test
Functional Test	Function test as customized

Three Special Reminders for PCBA

1. Parts Overages

Proper SMT machine setup and operation requires parts overages. Unused and excessive parts supplied by you or purchased by us will be packaged and returned to you with the assembled boards.

SMT parts which are not supplied on reels should be on one continuous strip of tape.

If you need to assemble the same SMT part in different boards, 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) 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., this will ensure smooth assembling and shipping your assembled boards on time. If you have any question or doubt, please send more extra or contact us for answers.

2. Panelization

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.

3. Break-away Rails (Break-away Tabs)

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.

PCB Assembly Requirement


# Types Of Assembly	(1) SMT Assembly	(2) SMT & THT Assembly	(3) 2-sided STM, THT Assembly	(4) Mixed Assembly
File Format	Gerber RS-274X	BOM(.xls, .csv, .xlsx)	Pick-N-Place / XY file	/
Component Footprint	0201 ,0402, 0603...	BGA, QFN, QFP, PLCC	SOIC, POP...	Small Pitch of 8 Mils
Component Package	Reels Package	Cut Tape Package	Tube and Tray	Loose Parts and Bulk
Testing Procedures	Visual Inspection	X-Ray Inspection	AOI, ICT (In-Circuit Test)	Functional Testing
Procedures	Lead-Free (Rohs)	Leaded Solder	Reflow Soldering	Wave Soldering
Others	Custom Reflow Profile	Standard Reflow Profile	Smallest Size: 50x50mm	Largest Size: 1200*460mm