Advantages and disadvantages of water-soluble solder paste?

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What fields are leaded solder pastes suitable for?

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  Lead-containing solder paste, with its low cost, excellent soldering performance, and adaptability, finds extensive application across various sectors including electronics manufacturing, metal processing, LED lighting, the automotive industry, communication equipment, aerospace, and defense industries. Specific applications include: Electronic Manufacturing and Repair Field PCB Soldering: Leaded solder paste serves as the core material for PCB soldering in electronic manufacturing. By melting, it bonds electronic components to the circuit board, ensuring stable current conduction. Its strong wettability forms full, bright solder joints with minimal residue. Featuring high insulation resistance, it meets no-clean requirements, preventing PCB corrosion and delivering high joint reliability. Surface Mount Technology (SMT): In SMT processes, leaded solder paste connects small components like surface-mount resistors and capacitors, enabling precision printing on ...
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Pad surface treatment in microelectronics and semiconductor packaging

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  In microelectronics and semiconductor packaging, the most basic purpose of pad surface treatment is to ensure good solderability and conductivity of the pads. Since copper tends to exist as oxide in air and is unlikely to remain as pristine copper for long, other treatments are required for copper. Although in the subsequent assembly, strong flux can be used to remove most of the copper oxide, but the strong flux itself is not easy to remove, so the industry generally does not use strong flux. Common PCB surface treatment processes are OSP, HASL, IAg, ISn, chemical nickel gold, chemical nickel palladium gold, chemical thin nickel palladium gold, electroplated nickel gold and electroplated gold, the following will be introduced one by one. OSP OSP is a layer of organic solder film over the copper foil of the PCB pad, which melts/cracks away when soldering, and the solder reacts with the copper foil of the pad to produce the scallop-shaped Cu6Sn5 and nano-thick Cu...
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The Development Trends of Ultra-Fine-Pitch LED Driver ICs

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  1. Definition of LED driver IC IC is Integrated circuit. It uses a number of processes to connect the physical tubes, diodes, resistors, capacitors, inductors, and other components with the wiring to make small semiconductor wafers or dielectric substrates. Then the wafers are packaged in the shells to form a microstructure with the desired circuit functionality. In the LED display, the functions of the driver IC are to receive the display data in accordance with the protocol, produce PWM and current time change, output PWM currents related to brightness, grayscale, refresh, and others, and illumine LEDs. 2. Costs of ultra-fine-pitch LED driver ICs The driver IC accounts for about 10% of the total cost of the ultra-fine-pitch LED display, while it comes in at 5% of the total cost of the traditional LED display. The cost of driver IC is mainly composed of wafer cost and sealing test cost. Wafer contributes to a high percentage of cost. 3. The development t...
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