Electronics Forum: j-lead solder (Page 1 of 5)

Laser solder reflection

Electronics Forum | Thu Nov 22 09:14:06 EST 2007 | paulallan

Does anyone have any experience in point to point laser soldering and laser light reflecting off of SMT component 'J' leads down on to the laminate. This appears to be a random situation we cannot understand nor control.

SMT packages that can solder inverted?

Electronics Forum | Thu Aug 28 16:13:06 EDT 2003 | Dan Gosselin

Thanks everyone for your help. I have since found a good article I am downloading of of the SMTA website. Dan Title : EFFECT OF SURFACE TENSION OF SOLDER ON UNDERSIDE DEVICE SUPPORT DURING REFLOW OF A PCBA Author : Mulugeta Abtew Author Company

What will be the effect of additional solder paste?

Electronics Forum | Tue Apr 19 13:23:33 EDT 2016 | vchauhan

We are using Vicor SMT J-Lead VI Chip which is big component on the bottom side. The manufacturer recommends to have 6 mil stencil but the customer required 10 mil stencil. The PWB has gold contacts on both sides. We noticed some mini solder splashes

Pin Hole Issue after Reflow Soldering - Passive Components

Electronics Forum | Wed Feb 14 04:48:58 EST 2018 | ameenullakhan

The profile I have shared is for SMQ92J leaded solder paste

Locating Defects with 2D AOI.

Electronics Forum | Mon May 07 09:47:11 EDT 2001 | orbotech

All defect types that can not be seen from top view, meaning - any defect which is characterized by more than its top 2D appearance will be hard, if at all possible, to detect by 2D imaging system. This includes: Lifted leads / co planarity J-lead

Re: Defects Definition

Electronics Forum | Tue Feb 08 03:14:37 EST 2000 | Roni H.

Hi Jose, J-lead are very sesitive to coplanarity, which is the major cause for the defect you described. Other posibility is that there is not enough solder paste ; J-lead need around 10% more solder past then L-lead, You have to consider the screen

QFP Coplanarity & Alloy 42

Electronics Forum | Tue Sep 30 21:00:41 EDT 2003 | davef

We're not clear on what you seek. So, as a starting point for our discussion, we wouldn't get agitated if we saw "routine" coplanarity of 4 thou. For instance: Maximum Lead Coplanarity [Altera] Package||Acronym||Lead material||Finish||Maximum Lead


Electronics Forum | Fri Nov 12 07:42:38 EST 1999 | Michael

We are looking for AOI for post solder inspection with short setup times for high mix assembly. Also the solder joint of J-Lead components should be inspected. We found two suppliers for such systems, Orbotech and Viscom. Can anyone help us to det

Re: Baffling soldering problems!

Electronics Forum | Wed Sep 30 20:56:31 EDT 1998 | Tony Barry

Assuming that your components and PCB's have good solerderabillty and are stored in an air conditioned environment and kept free of contaminants then your problem sounds as though there is insufficient wetting of the component leads due to low temper

AOI side angle cameras

Electronics Forum | Mon Jul 13 05:54:39 EDT 2009 | rway

Hello all, We are looking to purchase another AOI system with side angle cameras. Currently we are using a YesTech M1 system that has only a top-down camera (it can't be upgraded with side cameras). Does anyone have experience with YesTech F1 sys

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