Technical Library | 2019-02-13 13:45:11.0
Development of information and telecommunications network is outstanding in recent years, and it is required for the related equipment such as communication base stations, servers and routers, to process huge amount of data in no time. As an electrical signal becomes faster and faster, how to prevent signal delay by transmission loss is a big issue for Printed Circuit Boards (PCB) loaded on such equipments. There are two main factors as the cause of transmission loss; dielectric loss and conductor loss. To decrease the dielectric loss, materials having low dielectric constant and low loss tangent have been developed. On the other hand, reducing the surface roughness of the copper foil itself to be used or minimizing the surface roughness by modifying surface treatment process of the conductor patterns before lamination is considered to be effective in order to decrease the conductor loss. However, there is a possibility that reduction in the surface roughness of the conductor patterns will lead to the decrease in adhesion of conductor patterns to dielectric resin and result in the deterioration of reliability of PCB itself. In this paper, we will show the evaluation results of adhesion performance and electrical properties using certain type of dielectric material for high frequency PCB, several types of copper foil and several surface treatment processes of the conductor patterns. Moreover, we will indicate a technique from the aspect of surface treatment process in order to ensure reliability and, at the same time, to prevent signal delay at the signal frequency over 20 GHz.
Technical Library | 2016-03-24 17:37:09.0
Today's Electronic Industry is changing at a high pace. The root causes are manifold. So world population is growing up to eight billions and gives new challenges in terms of urbanization, mobility and connectivity. Consequently, there will raise up a lot of new business models for the electronic industry. Connectivity will take a large influence on our lives. Concepts like Industry 4.0, internet of things, M2M communication, smart homes or communication in or to cars are growing up. All these applications are based on the same demanding requirement – a high amount of data and increased data transfer rate. These arguments bring up large challenges to the Printed Circuit Board (PCB) design and manufacturing.This paper investigates the impact of different PCB manufacturing technologies and their relation to their high frequency behavior. In the course of the paper a brief overview of PCB manufacturing capabilities is be presented. Moreover, signal losses in terms of frequency, design, manufacturing processes, and substrate materials are investigated. The aim of this paper is, to develop a concept to use materials in combination with optimized PCB manufacturing processes, which allows a significant reduction of losses and increased signal quality.
Technical Library | 2014-08-19 15:39:13.0
Understanding warpage of package attach locations on PCBs under reflow temperature conditions is critical in surface mount technology. A new industry standard, IPC 9641, addresses this topic directly for the first time as an international standard.This paper begins by summarizing the sections of the IPC 9641 standard, including, measurement equipment selection, test setup and methodology, and accuracy verification. The paper goes further to discuss practical implementation of the IPC 9641 standards. Key advantages and disadvantages between available warpage measurement methods are highlighted. Choosing the correct measurement technique depends on requirements for warpage resolution, data density, measurement volume, and data correlation. From industry experience, best practice recommendations are made on warpage management of PCB land areas, covering how to setup, run, analyze, and report on local area PCB warpage.The release of IPC 9641 shows that flatness over temperature of the package land area on the PCB is critical to the SMT industry. Furthermore, compatibility of shapes between attaching surfaces in SMT, like a package and PCB, will be critical to product yield and quality in years to come.
Industry News | 2010-08-27 07:25:03.0
Package on Package (PoP) applications are growing in popularity for mobile and handheld professional electronics applications and with it placing further demands on assembly engineers.
Industry News | 2019-10-08 06:12:57.0
SHENMAO America, Inc. is pleased to announce plans to exhibit at the SMTA Guadalajara Expo & Tech Forum, scheduled to take place Oct. 23-24, 2019 at the Expo Guadalajara. The company will show its PF735-PQ10 Low Temperature Solder (LTS) and SM-862 Liquid Flux in Booth #602.
Industry News | 2019-11-25 11:02:32.0
SHENMAO America, Inc. announces that it will exhibit at the SMTA Silicon Valley Expo, scheduled to take place Wednesday, Dec. 4, 2019 at the Bestronics Box Build Facility in San Jose, CA. The company will showcase its PF735-PQ10 Low Temperature Solder (LTS) and SM-862 Liquid Flux.
Industry News | 2017-08-30 16:58:11.0
Akrometrix will be a panelist in the upcoming SMTAI Spotlight 5 panel discussion, scheduled to take place Wednesday, Sept. 10, 2017 from 2-3 p.m. The discussion, entitled “Warpage Induced Defects and Component Warpage Limits,” will be streamed on Facebook Live.
Industry News | 2021-11-22 08:31:08.0
Hanwha Techwin Automation Americas is pleased to announce that it received two 2021 GLOBAL Technology Awards in the categories of LED Production Equipment and Placement – High Volume for its HM520h Hybrid LED Mounter. The awards were announced during a ceremony that took place Tuesday, Nov. 16, 2021 during productronica in Munich, Germany.
Industry News | 2015-04-21 17:10:49.0
Saki Corporation will demonstrate its BF-3Di automated optical inspection and BF-3Si automated solder paste inspection systems at SMT Hybrid Packaging, Nuremberg, Germany, May 5-7 2015, in Stand 7-331.
Industry News | 2011-04-07 12:47:23.0
Panasonic Factory Solutions Company of America introduces the RL132 Radial Insertion Machine offering generation-ahead technologies in a spatially-efficient footprint.
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