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Technical Library | 2021-11-26 14:34:07.0
The use of desiccant bags filled with Silica Sand and or Clay beads used in conjunction with a Moisture Barrier Bag to control moisture for storage of printed circuit boards has long been an accepted practice and standard from both JEDEC and IPC organizations. Additionally, the use heated ovens for baking off moisture using the evaporation process has also been a long#2;standing practice from these organizations. This paper on alternative drying methods will be accompanied by completed independent, unbiased tests conducted by Vinny Nguyen, an engineering student (now graduated) from San Jose State University. The accompanied paper will examine the performance levels of different technologies of desiccant bags to control moisture in enclosed spaces. The tests and equipment set were reviewed by an engineer and consultant to the Lockheed Martin Aerospace Division and the IPC - TM-650 2.6.28 test method was review by engineer from pSemi. The tests were designed to mimic performance tests outlined in Mil Spec 3464, which both IPC and JEDEC have adopted for their respective standards. The test examined variables including absorption capacity rates, weight gain and release of moisture back into the enclosed area. The presentation will also address and highlight: • Similarities of PCBs and Heavy Equipment as it applies to Inspections, Causes of Failure, Types of Corrosion and Moisture Collection Points. • Performance Attributes of Different Desiccant Technologies as it applies to shape, texture, change outs, labeling and regeneration. • Venn Diagram of Electromechanical Failure with the circles 1. Current 2. Contamination 3. Humidity Presentation Available
New Equipment | Test Equipment
SMT AOI Machine Inspection Component: 0201 chip PCB width:380*380mm Dimension:980*1080*1410 mm Weight:600kg Product description: SMT AOI Machine SMT AOI Machine Specifications: Feature: 1.HD image, easy for 0402 chip. 2.Full color
New Equipment | Test Equipment
online AOI machine Inspection Component: 0201 chip PCB width:380*380mm Dimension:980*1080*1410 mm Weight:600kg Product description: China Automatic online AOI machine factory, Inspection Component: 0201 chip, PCB width:380*380mm, Dimension:98
New Equipment | Test Equipment
online AOI machine Inspection Component: 0201 chip PCB width:380*380mm Dimension:980*1080*1410 mm Weight:600kg Product description: China Automatic online AOI machine factory, Inspection Component: 0201 chip, PCB width:380*380mm, Dimension:9
New Equipment | Test Equipment
Online Automated AOI Machine Z588 Inspection Component: 01005 chip PCB size::50×50mm-330×400mm Dimension:950mm×1000mm×1580mm Weight: 670kg Product description: Online Automated AOI Machine Z588, Inspection Component:
New Equipment | Test Equipment
PCB Inspection Online AOI Machine Z588 Inspection Component: 01005 chip PCB size::50×50mm-330×400mm Dimension:950mm×1000mm×1580mm Weight: 670kg Product description: PCB Inspection Online AOI Machine Z588, Inspection C
New Equipment | Test Equipment
Online Automated AOI Machine Z588 Online Automated AOI Machine Z588 PCB size::50×50mm-330×400mm Dimension:950mm×1000mm×1580mm Weight: 670kg Product description: Online Automated AOI Machine Z588, Inspection Component: 0
SMT Reflow Oven Inspection Component: 01005 chip PCB size::50×50mm-330×400mm Dimension:950mm×1000mm×1580mm Weight: 670kg Product description: PCB Inspection Online AOI Machine Z588, Inspection Component: 01005 chip, PCB
China Automatic online AOI machine factory Inspection Component: 0201 chip PCB width:380*380mm Dimension:980*1080*1410 mm Weight:600kg Product description: Inspection Component: 0201 chip,PCB width:380*380mm,Dimension:980*1080*1410 mm,Weight:6