Electronics Assembly Knowledge, Vision & Wisdom
Nitrogen Effect For Wave Soldering
Nitrogen Effect For Wave Soldering
Paper describes the implementation of a wave soldering system using inert gas with economic benefits analyzed.
Production Floor

Authored By:
Han-Na Noh, Jae-Chan Kim, Dong-Woon Park, Il-Je Cho, Min-Jin Oh
LG Electronics
,{url:'http://www.circuitinsight.com/videos/nitrogen_effect_wave_soldering.mp4'},{url:'http://www.circuitinsight.com/videos/programs_final.mp4'}], clip:{autoBuffering:true, autoPlay:true, scaling:'scale' } }).ipad();
Transcript
Recently, with significant increases in solder manufacturing costs due to raw materials, electronics assemblers are finding solutions that save cost by reducing dross.

This paper describes the implementation of a wave soldering system using inert gas.

The system based on the PSA-generated nitrogen with residual oxygen levels of 100 parts-per-million has a low maintenance cost and is simple to retrofit.

In this study, technical results and economic benefits are analyzed by feasibility and actual test.

To analyze the effects of comparing nitrogen wave soldering with conventional soldering, the authors evaluated the wettability of assemblies, dross and solder joint reliability.

The inert wave soldering system showed significant dross reduction and its wettability was better than conventional.
Summary
Recently, with significant increasing of solder manufacturing cost due to raw materials, electronics makers are also faced with the same difficulty. And they are finding solutions that save cost by reducing the dross. This paper describes the implementation of a wave soldering system using inert gas. The system based on the PSA-generated nitrogen with residual oxygen levels of 100 ppm has low maintenance cost and is very simple to retrofit.

In this study, technical results and economic benefits are analyzed by feasibility and actual test. To analyze the effects of comparing nitrogen wave soldering with conventional air condition, we have evaluated the wettability of assemblies, dross and solder joint reliability. The inert wave soldering system shows significant dross reduction and its wettability is better than conventional. Also SEM analysis from solder joint shows good results.
Conclusions
This paper describes the implementation of a Nitrogen inerting retrofit system in a high volume, mixed-assembly plant where consumer products are manufactured. The conversion of existing wave soldering equipment to nitrogen was very simple to retrofit. The system based on the PSA-generated nitrogen with residual oxygen levels of 100ppm lowers dross production, helping assemblers realize a considerable operational cost savings. By reducing oxidation, wettability and reliability of the joint were improved. In on going work, we will measure the bonding strength of solder joints after thermal shock test and analyze the failure modes to evaluate the reliability of the solder joints.
Initially Published in the IPC Proceedings
Submit A Comment

Comments are reviewed prior to posting. Please avoid discussion of pricing or recommendations for specific products. You must include your full name to have your comments posted. We will not post your email address.

Your Name


Company


E-mail


Country


Comments


Authentication

Please type the number displayed into the box. If you receive an error, you may need to refresh the page and resubmit the information.



Related Programs
bullet Automated Soldering vs. Hand Soldering
bullet Top Side Reflow Causing Solder Balls
bullet How To Eliminate PCB Bow and Twist
bullet Board, Package and Die Thickness Effects Under Thermal Cycling Conditions
bullet Toe Fillet Requirements on Gull Wing Components
bullet Reworkable Edgebond Applied Wafer-Level Chip-Scale Package
bullet BGA Solder Ball Shelf Life
bullet Solder Pallets With Titanium Inserts - Yes/No?
bullet Selective Solder Pot Temperatures
bullet Reactivity of No-Clean Flux Trapped Under Bottom Terminated Components
More Related Programs