Industry News | 2022-12-21 11:10:43.0
BTU International, Inc. today announced the appointment of Assembly Resource as its new exclusive distributor for reflow soldering systems in Northern California and Northern Nevada.
Industry News | 2012-11-06 11:22:15.0
Dispensing and MID (Molded Interconnected Devices) technologies are developing rapidly. Current technology drivers are LED and communication products. On September 28th, Essemtec’s technology day focused on new developments and future challenges. The event was free of charge for all participants.
Industry News | 2013-02-01 15:00:00.0
Mentor Graphics announced the newest release of its market-leading HyperLynx® product for superior high-speed design and analysis. Key features in the new HyperLynx product release include advanced 3D channel and trace modeling, improved DDR signoff verification, and accelerated simulation performance—up to 5X faster.
Industry News | 2010-04-12 16:09:04.0
RESEARCH TRIANGLE PARK, N.C. — DuPont Circuit & Packaging Materials (CPM) introduced its newest high-performance laminate for printed circuit boards. DuPont™ Pyralux® TK flexible circuit material is a copper clad laminate and bonding film system specifically formulated with DuPont™ Teflon® fluoropolymer film and Kapton® polyimide film for high speed digital and high frequency flexible circuit applications. DuPont™ Pyralux® TK delivers the lowest dielectric constant (DK) of any thin laminate and bondply material on the market today.
Technical Library | 2021-02-04 01:56:56.0
In the present study, a model of closed-loop recycling of copper from PCBs is demonstrated, which involves the sequential application of bioleaching and electrowinning to selectively extract copper. This approach is proposed as part of the solution to resolve the challenging ... doi.org/10.1007/s12649-020-01128-9
Industry News | 2013-01-21 20:50:39.0
Flex Interconnect Technologies (FIT) announces that it has been re-certified by Lockheed Martin Missiles and Fire Control as its approved supplier for producing flex and rigid-flex circuits to IPC-6011 class 3 and IPC-6013 class 3
Technical Library | 2020-01-09 00:00:30.0
PCBs have a wide range of applications in electronics where they are used for electric signal transfer. For a multilayer build-up, thin copper foils are alternated with epoxy-based prepregs and laminated to each other. Adhesion between copper and epoxy composites is achieved by technologies based on mechanical interlocking or chemical bonding, however for future development, the understanding of failure mechanisms between these materials is of high importance. In literature, various interfacial failures are reported which lead to adhesion loss between copper and epoxy resins. This review aims to give an overview on common coupling technologies and possible failure mechanisms. The information reviewed can in turn lead to the development of new strategies, enhancing the adhesion strength of copper/epoxy joints and, therefore, establishing a basis for future PCB manufacturing.
Technical Library | 2017-04-20 13:51:14.0
The one constant in electronics manufacturing is change. Moore's Law, which successfully predicted a rate of change at which transistor counts doubled on Integrated Circuits (ICs) at lower cost for decades, is ceding to be an appropriate prediction tool. Increasing technical and economic requirements, deriving from the semiconductor environment, are cascaded down to the printed circuit and in particular to the IC substrate manufacturers. This is both a challenge and an opportunity for IC Substrate manufacturers, when dealing with the demands of the packaging market. (...)This paper introduces two new electroless copper baths developed for IC substrates manufacturing based on Semi Additive Process (SAP) technology (hereafter referred to as E'less Copper IC) and HDI production (hereafter referred to as E'less Copper HDI) and optimized for high throw into BMVs. An introduction to reliable throwing power measurement methods based on scanning electron microscope (SEM) is given, followed by a compilation and discussion of key performance criteria for each application, namely throwing power, copper adhesion on the substrate, dry film adhesion and reliability.
Technical Library | 2015-12-23 16:57:27.0
The onset of copper barrel cracks is typically induced by the presence of manufacturing defects. In the absence of discernible manufacturing defects, the causes of copper barrel cracks in printed circuit board (PCB) plated through holes is not well understood. Accordingly, there is a need to determine what affects the onset of barrel cracks and then control those causes to mitigate their initiation.The objective of this research is to conduct a design of experiment (DOE) to determine if there is a relationship between PCB fabrication processes and the prevalence of fine barrel cracks. The test vehicle used will be a 16-layer epoxy-based PCB that has two different sized plated through holes as well as buried vias.
Technical Library | 2019-07-17 17:56:34.0
The increased demand for electronic devices in recent years has led to an extensive research in the field to meet the requirements of the industry. Electrolytic copper has been an important technology in the fabrication of PCBs and semiconductors. Aqueous sulfuric acid baths are explored for filling or building up with copper structures like blind micro vias (BMV), trenches, through holes (TH), and pillar bumps. As circuit miniaturization continues, developing a process that simultaneously fills vias and plates TH with various sizes and aspect ratios, while minimizing the surface copper thickness is critical. Filling BMV and plating TH at the same time, presents great difficulties for the PCB manufactures. The conventional copper plating processes that provide good via fill and leveling of the deposit tend to worsen the throwing power (TP) of the electroplating bath. TP is defined as the ratio of the deposit copper thickness in the center of the through hole to its thickness at the surface. In this paper an optimization of recently developed innovative, one step acid copper plating technology for filling vias with a minimal surface thickness and plating through holes is presented.
