Technical Library | 2023-08-04 15:38:36.0
The MicroLeadFrame® (MLF®)/Quad Flat No-Lead (QFN) packaging solution is extremely popular in the semiconductor industry. It is used in applications ranging from consumer electronics and communications to those requiring high reliability performance, such as the automotive industry. The wide acceptance of this packaging design is primarily due to its flexible form factors, size, scalability and thermal dissipation capabilities. The adaptation and acceptance of MLF/QFN packages in automotive high reliability applications has led to the development of materials and processes that have extended its capabilities to meet the performance and quality requirements. One of process developments that is enabling the success of the MLF/QFN within the automotive industry has been the innovation of side wettable flanks that provide the capability to inspect the package lead to printed circuit board (PCB) interfaces for reliable solder joints. Traditionally, through-board X-ray was the accepted method for detecting reliable solder joints for leadless packages. However, as PBC layer counts and routing complexities have increased, this method to detect well-formed solder fillets has proven ineffective and incapable of meeting the inspection requirements. To support increased reliability and more accurate inspection of the leadless package solder joints, processes to form side-wettable flanks have been developed. These processes enable the formation of solder fillets that are detectable using state-of-the-art automated optical inspection (AOI) equipment, providing increased throughput for the surface mount technology (SMT) processes and improved quality as well.
Technical Library | 2023-07-25 16:25:56.0
This paper address two significant applications of stencils in advance packaging field: 1. Ultra-Thin stencils for miniature component (0201m) assembly; 2. Deep Cavity stencils for embedded (open cavity) packaging. As the world of electronics continues to evolve with focus on smaller, lighter, faster, and feature-enhanced high- performing electronic products, so are the requirement for complex stencils to assemble such components. These stencil thicknesses start from less than 25um with apertures as small as 60um (or less). Step stencils are used when varying stencil thicknesses are required to print into cavities or on elevated surfaces or to provide relief for certain features on a board. In the early days of SMT assembly, step stencils were used to reduce the stencil thickness for 25 mil pitch leaded device apertures. Thick metal stencils that have both relief-etch pockets and reservoir step pockets are very useful for paste reservoir printing. Electroform Step-Up Stencils for ceramic BGA's and RF Shields are a good solution to achieve additional solder paste height on the pads of these components as well as providing exceptional paste transfer for smaller components like uBGAs and 0201s. As the components are getting smaller, for example 0201m, or as the available real estate for component placement on a board is getting smaller – finer is the aperture size and the pitch on the stencils. Aggressive distances from step wall to aperture are also required. Ultra-thin stencils with thicknesses in the order of 15um-40um with steps of 15um are used to obtain desired print volumes. Stencils with thickness to this order can be potential tools even to print for RDLs in the package.
Technical Library | 2003-05-05 07:36:58.0
The stencil selection process can be confusing, particularly when creating a stencil for a new application. This tutorial, which covers stencils for SMT and advanced IC packaging applications, offers guidelines to assist users in stencil selection and print optimization.
Technical Library | 2021-04-01 14:36:51.0
This document provides information about the Surface Mount Technology (SMT) board assembly of Infineon Thin Small Non-leaded Packages (TSNP). The specific dimensions of the leadframe based inner setup depend on the size of the chip and the type of bonding. The field of application ranges from linear voltage regulators for weight-limited applications such as cellular phones and digital cameras to linear voltage regulators for the automotive sector.
Industry News | 2012-04-26 20:21:26.0
Juki Automation Systems, a world-leading provider of automated assembly products and systems and part of Juki Corporation, announces that it has been awarded a 2012 EM Asia Innovation Award in the category of Software
Industry News | 2012-04-26 20:23:32.0
Juki Automation Systems, a world-leading provider of automated assembly products and systems and part of Juki Corporation, announces that it has been awarded a 2012 EM Asia Innovation Award in the category of Software
Industry News | 2013-03-28 11:07:45.0
SMT/Hybrid/Packaging 2013 Hall/Stand 7-203 Viscom AG,will be introduced at the SMT/Hybrid/Packaging Exhibition and Conference, April 16-18, 2013 at the Messezentrum in Nuremberg, Germany.
Industry News | 2013-10-08 13:18:07.0
Aegis Software has launched an entirely new multi-lingual website designed to showcase the Company's flagship Manufacturing Operations software, FactoryLogix for their fast-growing international audience.
Industry News | 2010-04-11 01:11:51.0
REDMOND, Wash. - Data I/O Corporation (NASDAQ: DAIO) announces that it has been awarded a 2010 SMT VISION Award in the category of Device Programming for its FlashCORE III.
Industry News | 2017-09-20 15:08:48.0
Viscom AG today announced the adoption of the Valor® Process Preparation technology from Mentor, a Siemens business, for its Viscom vVision SPI and AOI systems. Recognized globally for providing superior 3D optical and X-ray inspection systems for electronics manufacturing, Viscom is seeing important benefits in using this additional tool. When combined with Valor Process Preparation software, the efficiency of the machines is significantly enhanced.
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