勛圖tv ﹞ ENGINEERING GUIDEPCBA Conformal Coating: Specify Cleaning, Masking, Cure and InspectionPCBA conformal coating applies a protective polymer film to selected areas of an assembled circuit board. The process includes surface preparation, controlled application, cure and verification. A resin name alone does not define a…
Read articleIntroduction Ultiboard is a printed circuit board (PCB) design software from Mentor Graphics that provides schematic capture and PCB layout tools for professionals. This tutorial will guide you through the basic workflow and features of Ultiboard to create a simple board design. Creating a New Project To start a new design in Ultiboard: A new […]
Read articleIn PCB design, a fiducial marker is a small, rounded copper feature that serves as a reference point for automated pick-and-place assembly machines. These markers enable machine vision systems to accurately detect the PCB＊s position and orientation as it moves through Surface Mount Technology (SMT) assembly lines. By comparing the PCB＊s alignment with the pre-programmed orientation of components on reels, the machine […]
Read articleVia-in-pad means that a via is located within a component’s solder land. It describes placement, not a single filling process. VIPPO, or via-in-pad plated over, is a particular implementation that presents a plated surface over a filled via. Selecting it requires agreement on the package footprint, via structure, filling and capping process, and assembly requirements. […]
Read articleIntroduction Digital signals are a fundamental concept in electronics and communications. In contrast to analog signals which can vary continuously, digital signals have discrete stepped levels representing binary logic states. Understanding the nature of digital signals is key to working with digital circuits and systems. This article provides a comprehensive overview of digital signals, covering […]
Read articlePCB Manufacturing / HDI PCB勛圖tv ﹞ Route selection ﹞ engineering comparisonBlind vias vs buried vias: choose by the connectionCompare physical access, routing, fabrication sequence and verification. Classify a layer span and identify what to ask before choosing a via route.Discuss your via strategyOpen the worksheetPreliminary…
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