Tape & Reel, Lead Inspection, Lead Repair, Moisture Bake. Vacuum Seal, Qa Inspection services for the IC Manufactures, Contract Manufactures and Distributer. Based in the Heart Silicon Valley.
IDC is the developer of a low temperature baking process for removing moisture from moisture sensative package, while they remain in either tape or tubes. It is currently engineering equipment to support the process.
New Equipment | Tape and Reel Services
Moisture control has always been an extremely important issue with Surface Mount Devices. However, with the evolution to No-Lead the issues are more pronounced. Mid America can bake your parts and Dry Pack them for you with a humidity indicator card
Reflow cycle - runs the oven through the pre-defined temperature profile.> Bake cycle - used to drive the moisture from moisture-sensitive components.>
Electronics Forum | Mon Jun 28 09:15:21 EDT 2004 | jdumont
Morning all, we have been seeing some problems with the edges of some of our BGA's curling away from the PCB after reflow. Is this possibly a moisture problem? If so what would be a good time/temp to bake them at to rectify the problem? Thanks in
Electronics Forum | Mon Jun 28 10:02:06 EDT 2004 | fmonette
The answer is yes, it is possibly a moisture-related problem. You can confirm this by baking your parts at 125C for 48 hours (ref. J-STD-033A, table 4-1). For more technical background on this issue I recommend you read the following paper : Impac
Industry News | 2010-09-13 15:36:15.0
IPC — Association Connecting Electronics Industries® has released IPC-1601, Printed Board Handling and Storage Guidelines. The industry's sole standard on the handling, packaging and storage of printed boards, IPC-1601 provides users with guidance on how to protect printed boards from contamination, physical damage, solderability degradation, electrostatic discharge and moisture uptake.
Industry News | 2009-10-16 16:10:36.0
User-Configurable Process Audit Tool
Technical Library | 2018-09-21 10:12:53.0
Moisture accumulates during storage and industry practice recommends specific levels of baking to avoid delamination. This paper will discuss the use of capacitance measurements to follow the absorption and desorption behaviour of moisture. The PCB design used in this work, focused on the issue of baking out moisture trapped between copper planes. The PCB was designed with different densities of plated through holes and drilled holes in external copper planes, with capacitance sensors located on the inner layers. For trapped volumes between copper planes, the distance between holes proved to be critical in affecting the desorption rate. For fully saturated PCBs, the desorption time at elevated temperatures was observed to be in the order of hundreds of hours. Finite difference diffusion modelling was carried out for moisture desorption behaviour for plated through holes and drilled holes in copper planes. A meshed copper plane was also modelled evaluating its effectiveness for assisting moisture removal and decreasing bake times. Results also showed, that in certain circumstances, regions of the PCB under copper planes initially increase in moisture during baking.
Technical Library | 2024-09-02 18:48:58.0
The conversion to higher temperature "Lead Free" assembly reflow conditions has created an increased awareness that entrapped or absorbed moisture is a frequent root cause of thermally induced delamination at assembly reflow. There are two connected failure modes from entrapped moisture; incomplete resin cross-linking resulting in premature resin decomposition and also severe Z axis expansion from "explosive vaporization of the entrapped moisture at elevated temperatures at assembly reflow". Ultimately, both result in delamination failure. Other papers have shown the negative effects of entrapped moisture before lamination including delamination, red color, reduced thermal reliability and increased high speed signal loss. In this paper, various materials were tested for moisture sensitivity during lamination. Tests were performed at varying lamination conditions including a pre-vacuum step and "kiss" step. Pressure and cure temperature parameters were evaluated for minimizing or eliminating the effect of trapped moisture. Also included are the results of inner layer moisture removal baking conditions and their effect on peel strength and thermal reliability.
Imagineering, Inc. | https://www.pcbnet.com/blog/everything-you-need-to-know-about-moisture-sensitive-devices-msds/
. The interior humidity of the bag should stay at less than 10% at 77°F. Any exposure to dampness may require a re-bake, which should reverse any moisture the device has collected
| https://www.eptac.com/faqs/ask-helena-leo/ask/ceramic-ccas-and-aqueous-wash-and-bake-out-prior-to-parylene-coating
: I have a question concerning ceramic CCA and their bake out after aqueous wash cycle prior to parylene coating. In theory, parylene deposition will draw off any moisture before the coating process
