Industry News | 2015-04-20 09:01:45.0
Rogers 4003c ,4 layer PCB assembly
Industry News | 2016-03-17 11:05:22.0
Sam Sangani, President and owner of PNC has announced that his company recently added a new Universal Pick and Place machine model Genesis GI-07 to its fast growing assembly department.
Industry News | 2015-06-11 19:47:33.0
NATEL Engineering Company and OnCore Manufacturing announced today that the merged company will be named: NEO Technology Solutions (NEO Tech). The name NEO Tech captures and combines the company’s legacy members; NATEL Engineering, EPIC Technologies, and OnCore Manufacturing, while creating a name on which to build a brand.
Industry News | 2015-06-12 11:41:24.0
CHATSWORTH, CA – May 18, 2015 – NATEL Engineering Company, Inc. and OnCore Manufacturing, LLC announced today that the merged company will be named: NEO Technology Solutions (NEO Tech). The name NEO Tech captures and combines the company’s legacy members; NATEL Engineering, EPIC Technologies, and OnCore Manufacturing, while creating a name on which to build a brand.
Technical Library | 2022-12-05 16:28:06.0
The work evaluates the impact of latent heat (LH) absorbed or released by a solder alloy during melting or solidification, respectively, on changes of dimensions of materials surrounding of the solder alloy. Our sample comprises a small printed circuit board (PCB) with a blind via filled with lead-free alloy SAC305. Differential scanning calorimetry (DSC) was employed to obtain the amount of LH per mass and a thermomechanical analyzer was used to measure the thermally induced deformation. A plateau during melting and a peak during solidification were detected during the course of dimension change. The peak height reached 1.6 μm in the place of the heat source and 0.3 μm in the distance of 3 mm from the source. The data measured during solidification was compared to a numerical model based on the finite element method. An excellent quantitative agreement was observed which confirms that the transient expansion of PCB during cooling can be explained by the release of LH from the solder alloy during solidification. Our results have important implications for the design of PCB assemblies where the contribution of recalescence to thermal stress can lead to solder joint failure.
Technical Library | 2008-02-26 15:02:19.0
More and more chip packages need multi-GHz RF structures to meet their performance targets. The ideal chip package needs to combine RF features with Digital features for these applications. They drive low-loss, controlled impedance transmission lines, flexibility in assigned signal and power layers, and clearances of various shapes in power layers. Building these features in a chip package is difficult without making the stack-up very thick or compromising the reliability of the product. In the present paper, we have designed and built a flip-chip package test vehicle (TV) to make new RF structures, using Z-axis interconnection (Zinterconnect) building blocks.
Industry News | 2018-09-26 14:06:56.0
StratEdge Corporation will display its high-frequency, high-speed, thermally efficient packages at IMAPS, BCICTS, and EDI CON USA. StratEdge's packages meet the extreme demands of gallium nitride (GaN) and gallium arsenide (GaAs) devices and the critical requirements of the telecom, mixed signal, VSAT, broadband wireless, satellite, military, test and measurement, automotive, down-hole, and MEMS markets.
Industry News | 2016-04-28 17:33:05.0
Kester is proud to announce the launch of NF372-TB Flux-Pen® and RF550 Rework Flux. These products were formulated to compliment Kester’s high-reliability, no-clean product line.
Technical Library | 2023-07-25 16:50:02.0
Some of the new handheld communication devices offer real challenges to the paste printing process. Normally, there are very small devices like 01005 chip components as well as 0.3 mm pitch uBGA along with other devices that require higher deposits of solder paste. Surface mount connectors or RF shields with coplanarity issues fall into this category. Aperture sizes for the small devices require a stencil thickness in the 50 to 75 um (2-3 mils) range for effective paste transfer whereas the RF shield and SMT connector would like at least 150 um (6 mils) paste height. Spacing is too small to use normal step stencils. This paper will explore a different type of step stencil for this application; a "Two-Print Stencil Process" step stencil. Here is a brief description of a "Two-Print Stencil Process". A 50 to 75 um (2-3 mils) stencil is used to print solder paste for the 01005, 0.3 mm pitch uBGA and other fine pitch components. While this paste is still wet a second in-line stencil printer is used to print all other components using a second thicker stencil. This second stencil has relief pockets on the contact side of the stencil any paste was printed with the first stencil. Design guidelines for minimum keep-out distances between the relief step, the fine pitch apertures, and the RF Shields apertures as well relief pocket height clearance of the paste printed by the first print stencil will be provided.
Industry News | 2019-08-15 07:31:59.0
AXI is short for automated X-ray inspection, it's one of the most commonly used approaches for defect inspection in PCB Assembly.
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