Year: 2025

Differences Between Packaging Substrates and PCBs

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Differences Between Packaging Substrates and PCBs

Although both packaging substrates (IC packaging boards) and printed circuit boards (PCBs) serve connection and support functions in electronic devices, there are essential differences between the two in terms of definition, functional positioning, technical parameters, material processes, and application scenarios. 1. Core Definitions and Functional Positioning Differences 1.Packaging Substrate lDefinition: A special substrate that directly … Read more

Impedance Testing of PCB Boards

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Impedance Testing of PCB Boards

Definition of Impedance In a circuit with resistance, inductance, and capacitance, the hindrance to the current in the circuit is called impedance. Impedance is commonly represented by Z, which is a complex number. The real part is called resistance, and the imaginary part is called reactance. The hindrance caused by capacitance in the circuit to … Read more

High Debt in the PCB Industry: Not Borrowing Money Means Waiting for Death

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High Debt in the PCB Industry: Not Borrowing Money Means Waiting for Death

The essence of the industry is to burn money for technology; without money, you are out. Equipment is as expensive as a money printing machine, with an investment of over 1 billion for a high-end HDI production line, and even more for lines with more than 18 layers. Huadong Technology’s factory in Thailand invested 1.7 … Read more

Update on PCB Developments

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Update on PCB Developments

Summary of developments related to NVIDIA server PCB products:1. H100 Related Information• Order Visibility: Currently, order visibility extends to August, and subsequent production schedules are closely dependent on client demand trends. If client demand remains stable, production schedules after August may maintain the current pace; however, any fluctuations in client demand, whether an increase leading … Read more

Overview: Common PCB Hardware Interface Design Requirements!

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Overview: Common PCB Hardware Interface Design Requirements!

When designing PCBs, the design requirements for common hardware interfaces are crucial for ensuring circuit performance and stability. Below are some common hardware interface PCB design requirements: 1. USB Interface Design Requirements ① Total length control: Keep it within 1800 mils as much as possible. ② Differential pair characteristic impedance: 90Ω. ③ Power pin trace … Read more

Introduction to PCB Circuit Board Design: Basic Learning Notes

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Introduction to PCB Circuit Board Design: Basic Learning Notes

1: Drawing Arduino Circuit Boards (Schematic Library, PCB Library, Schematic, PCB Drawing) 1. Drawing Schematic Library (Use existing libraries, or create your own) [SCH Library] Here is an example Add sub-file: Select -> Tools -> New Component Method 1: Draw one by one Below are some examples and effect images ATMEGA328P-AU CH340G LM358 USB-B PT … Read more

The Importance of Establishing a Follow-up System in the PCB Industry

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The Importance of Establishing a Follow-up System in the PCB Industry

Hello, everyone! I am Weiwei, and today marks the 47th day of my continuous sharing. Yesterday, I shared whether a separate follow-up is necessary and some simple processes. Today’s topic is: Why must the PCB industry establish a follow-up system? What is the importance of follow-up?. Common issues: From a sales perspective, if follow-up is … Read more

Understanding PCB Mark Points

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Understanding PCB Mark Points

1. What is a Reference Point (Mark Point)? Mark point is also known as a reference point or optical positioning point, which is used as a positioning point by pick-and-place machines. Since PCBs provide a common measurable point for all steps in the assembly process during mass production, every device used in assembly can accurately … Read more

STM32F4 Core Board High-Speed Transmission Testing Notes

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STM32F4 Core Board High-Speed Transmission Testing Notes

1. Determine the Plan and Purpose Hello everyone, today the miniaturized development board has arrived, and we are starting the arrival inspection task. The requirements are as follows: [Notes] STM32F4 + FT232H High-Speed Acquisition Development Board Design Draft Objective: STM32F4 Development Board 01. High-speed transmission testing, and reliable verification; 02. ADS1220 driver verification and debugging; … Read more

Major Announcement from the Central Committee and State Council: Three Key Signals for Grassroots Healthcare

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Major Announcement from the Central Committee and State Council: Three Key Signals for Grassroots Healthcare

The release of the “Opinions” marks a strategic shift in China’s healthcare system from a “city-centered” approach to a “grassroots-centered” one. For practitioners, this represents both a challenge—shifting from a passive waiting for patients to an active ecosystem building—and an opportunity, as policy benefits are accelerating towards grassroots levels. There are significant market gaps in … Read more