Home > Industry news

Poor Penetration on a Printed Circuit Board-WAVE SOLDERING DEFECTS

For a solder joint to form on the topside of a board, flux needs to be present in the plated through holes. The temperature of the topside of the board needs to have reached a minimum of 100-110°C. The most common process problem today with no clean is limited flux application. It is generally uncommon to have problems with through hole plating provided a board manufacturer's products are evaluated prior to use. It is also firmly uncommon to have contamination in the through hole causing this sort of problem. If flux penetration is present and correct pre-heat obtained then have the printed board tested.


Figure 1: Poor penetration is caused by either inadequate flux application or inadequate pre-heating
Figure 1: Poor penetration is caused by either inadequate flux application or inadequate pre-heating.


In Figure 2, the solder has failed to fill the plated through hole on one side of the component. The solder has wetted the PCB, but failed to fully wet the component lead, which is more likely to be flux related. If the fault is with the process conditions, there should be other positions on the board that have a similar problem. Simple solderability testing of the board and component termination should indicate if the fault is process or material related.


Figure 2: Poor penetration here is likely to be flux related

Figure 2: Poor penetration here is likely to be flux related.

Flason Electronic Co.,ltd provide a full smt assembly line solutions, including SMT reflow ovenwave soldering machinepick and place machinesolder paste printerPCB loaderPCB unloaderchip mounterSMT AOI machine,SMT SPI machineSMT X-Ray machineSMT assembly line equipmentPCB production Equipment smt spare partsetc any kind SMT machines you may need, please contact us for more information: wechat whatsapp:008613691605420, Skype: flasonsmt, Email: sales@flason-smt.com

FAQ

1) This is the first time I use this kind of machine, is it easy to operate?

There is English manual or guide video that show you how to use machine.

If you still have any question, please contact us by e-mail / skype/ phone /trademanager online service.

2) If machine have any problem after I receive it, how can I do ?

Free parts send to you in machine warranty period.

If the part is less than 0.5KG, we pay the postage.

If it exceeds 0.5KG, you need to pay the postage.

3) MOQ ?

1 set machine, mixed order is also welcomed.

4) How can I buy this machine from you? ( Very easy and flexible !)

A. Consult us about this product on line or by e-mail.

B. Negotiate and confirm the final price , shipping , payment methods and other terms.

C. Send you the proforma invoice and confirm your order.

D. Make the payment according to the method put on proforma invoice.

E. We prepare for your order in terms of the proforma invoice after confirming your full payment.

And 100% quality check before shipping.

F.Send your order by air or by sea.

5)Why choose us ?

A. Gold supplier on Alibaba !

B. Trade assurance to US$54,000 !

C. Best price & Best shipping & Best service !


Contact information

CONTACT US

Contact: Mr Tommy

Phone: 13691605420

Tel: 0755-85225569

Email: sales@flason-smt.com

Add: Flason Industry park Shajing Town Baoan district shenzhen China 518104