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How to Prevent Non-Wetting Defect during the SMT Reflow Process

2017-06-05

Wetting issues are classified by Non-wetting and Dewetting. According to the IPC standard, non-wetting is defined as the inability of molten solder to form a metallic bond with the base metal.

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How To Place Diodes Using Silk Screen Marks

2017-06-03

Diodes are polarized components that must be placed on a PCB in a certain way. However, a board that has a (+) silk screen marking is not enough information to tell the assembly house how to correctly insert a diode because there are different types of di

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How to optimize the reflow profile?

2017-06-02

According to the recommendation by the IPC association, the generic Pb-free solder reflow profile is shown below. The GREEN area is the acceptable range for the whole reflow process. Does it mean that every spot in this GREEN area should fit your board re

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How to Maintain a Reflow Oven?

2017-06-01

Proper reflow overn maintenance can extend its life cycle, keep the machine in good condition, and improve production efficiency and product quality. One of the most important tasks for properly maintaining a reflow oven is remove the built-up flux residu

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How to get real-time thermal data for a PCB?

2017-05-31

Although there is a thermal data testing function for our reflow oven, Shenzhen Grande Electronic still uses a high-end, off-line, KIC thermal profiler as our key instrument for optimizing the reflow profile for every board.

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How to Get a Quote for Turnkey Circuit Assembly?

2017-05-26

Turnkey printed circuit board assembling manufacturers mainly provide both types of assembling services i.e. Full Turnkey service including ordering all parts and Partial Turnkey service where the customer arranges for circuit boards or components and the

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How to Export Gerber Files from Eagle

2017-05-25

The purpose of this document is to assist Shenzhen Grande’s clients in the process generating Gerber files using the software suite known as Eagle. Shenzhen Grande asks that its clients supply their PCB design files in this format because Gerber is the in

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How to Create a Reflow Profile for a PCB?

2017-05-24

How to Create a Reflow Profile for a 16-layer, 2mm Thickness PCB with a High Density SMT Connector?A high density SMT connector, such as the Samtec .050" SEARAY™ High Speed High Density Open Pin Field Array, has up to 500 I/O contact pins with a sold

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How to create a Centroid File from Eagle, Altium and ORCAD/ALLEGRO?

2017-05-23

To place surface mounted parts on PCBs via automated equipment, it is necessary to create a Centroid file to program the equipment. A Centroid file contains all the positional parameters such that the machine knows where to place a component and in what o

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PCB Assembly: How to attach a thermocouple to a target PCB?

2017-05-22

It is important to monitor the temperature during the PCB Assembly SMT reflow process, especially for LEAD-Free processes. The components can suffer excessive thermal shock very easily. A thermocouple can be attached to a target circuit board to obtain re

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