Petroferm offers a complete line of aqueous and semi-aqueous cleaning chemistries for use in batch and inline spray-in-air cleaning equipment. These cleaning materials are used for defluxing (removing post reflow solder paste residues) circuit boards
Electronics Forum | Mon Mar 27 22:20:04 EST 2006 | davef
Mike The air 'contained' in the aperture would prefer to escape between the board and the bottom of the stencil rather than through your paste while you're printing over it.
Electronics Forum | Sun Mar 26 19:02:05 EST 2006 | ms
Hi We are running automatic stencil printers, open squeegees, stainless stencil, stainless blades, print speed 25-30mm/sec. We have a frustrating consistency issue printing .37x.3mm apertures on a 45pin LGA (11 pads each side, 1 large ground in mid
Industry News | 2018-10-18 08:34:52.0
How to Prevent Solder Bridging in 3528 PLCC6 RGB LEDs?
Technical Library | 2019-07-24 23:55:32.0
Voiding is a key concern for components with thermal planes because interruptions in Z-axis continuity of the solder joint will hinder thermal transfer. When assembling components with solder paste, there is a high propensity for voiding due to the confined nature of the solder paste deposits under the component. Once reflowed, many factors contribute to the amount of voiding in a solder joint such as the reflow profile, designs of the component, board and stencil, and material factors. This study will focus on the solder paste alloy and flux combination as well as profile and board surface finishes.
Technical Library | 2008-03-18 12:36:31.0
This paper examines the construction of a notebook mainboard with more than 2000 components and no wave soldering required. The board contains standard SMD, chipset BGAs, connectors, through hole components and odd forms placed using full automation and soldered after two reflow cycles under critical process parameters. However, state of the art technology does not help if the process parameters are not set carefully. Can all complex BGAs, THTs and even screws be soldered on a single stencil? What will help us overcome bridging, insufficient solder and thombstoning issues? This paper will demonstrate the placement of all odd shape components using pin-in-paste stencil design and full completion of the motherboard after two reflow cycles.
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The PCB assembly courses provide knowledge of different processes and equipment used in TH and SMT assembly of printed circuit boards.
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SNR MANUFACTURING ENGINEER WANTED Design Change Management and New product Introduction. Solder paste printing process (knowledge of Fuji screen printer machines. Stencil design/ modification and the use of Gerber data. SMT placement machines (Kno
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