Function Introduction

The NS series vacuum reflow soldering machines are the third generation of compact vacuum reflow soldering equipment introduced by Zhongke. Designed for small batch production, R&D design, functional material testing, and other applications, the NS series vacuum reflow soldering machines heat in a vacuum environment to achieve void-free solder joints, fully meeting the requirements of the R&D department for testing and small batch production. The NS series vacuum reflow soldering can reduce the void range of the焊接 area to 2%, whereas the range for conventional reflow soldering is 20%~30%. The NS series is applicable for soldering without flux, void-free joints, and can be used with various atmospheres such as N2, N2/H2 (95%/5%), and more. The NS series can utilize lead-free solder paste or solder strips, as well as lead-free soldering processes. The software control system of the NS series vacuum reflow soldering is user-friendly, allowing direct control of the equipment and setting various welding process curves, which can be modified and created based on different processes.

The NS series vacuum reflow soldering machines are primarily designed for high-demand welding fields, such as industrial-grade high-reliability products, where even nitrogen protection or gas-phase welding cannot meet the reliability requirements of the products. This includes applications like material testing, chip packaging, electrical equipment, automotive products, train control systems, aerospace, and aviation systems, which require high reliability in circuit welding. To eliminate or reduce voids and oxidation in welding materials, vacuum reflow soldering machines are the ideal choice. To achieve high-quality welding, the use of a vacuum reflow soldering machine is essential. This is a technological innovation by welding experts in various fields in Germany, Japan, the United States, and other countries.

Industry Applications: The NS series vacuum reflow soldering machines are an ideal choice for R&D, process development, material testing, and device packaging testing. They are perfect for high-end research and production in various fields such as enterprises, research institutes, universities, and aerospace industries.

Application Fields: Primarily used for defect-free welding and appropriate fluxless welding on components such as chips and substrates, casings and lids, including IGBT encapsulation, solder paste processes, laser diode packaging, hybrid integrated circuit packaging, casing and lid packaging, MEMS, and vacuum encapsulation.

Vacuum reflow soldering has now become an essential piece of equipment for various enterprises, as well as for high-end manufacturing in industries such as aviation and aerospace, in developed countries like Europe and the United States. It is also widely used in chip packaging and electronic welding fields.

Product Features

1. True vacuum welding environment, achieving a vacuum level of up to 6*10^-1 Pa.

2. Pressure Retention Rate: Chamber vacuum below 30Pa (pumped to 5Pa, valve closed to start pressure retention) within 30 minutes for low-activity flux welding environment.

3. Professional software control for an excellent operational experience.

4. A programmable temperature control system with up to 40 stages for the industry, allowing for the setting of appropriate process curves.

5. Temperature settings can be adjusted to achieve a process that is closer to the material's welding process curve.

6. Standard equipment includes cooling technology for rapid temperature reduction.

7. Online temperature measurement function. Achieves evenness measurement of the welding area temperature. Provides expert-level support for process calibration.

8. Nitrogen or other inert gases, to meet the special welding requirements of specific processes.

9. Temperature of 450℃ (higher options available), meets all soft soldering process requirements.

10. Meets the requirement for simultaneous heating of both upper and lower greenhouses.

Unique Advantages

1. Locking Method: Door retraction via automated program

2. Heating tube installation: Distributed at a 90-degree angle at the bottom and top, ensuring uniform temperature distribution, especially around the four edges of the heating plate.

3. The heating tube comes with a quartz sleeve, ensuring that the vacuum in the furnace chamber is not affected during replacement, for a convenient and quick process.

4. A specially designed bracket ensures the heating tube is centered within the quartz tube, effectively extending the quartz tube's lifespan.

5. The heating tube features a high-temperature coating on the back, enhancing the efficiency of heat utilization.

6. The vacuum chamber is precision machined as a single unit using CNC technology, minimizing the risk of焊接漏焊, and boasts a vacuum stability of over 10 years.

7. The vacuum door automatic locking device is precision-machined as a CNC integrated unit, effectively enhancing the stability of slight positive pressure for long-term use.

8. The vacuum cavity cooling pipeline is precision-machined as a CNC integrated unit, eliminating the risk of leaks in the vacuum cavity cold water pipe welding.

9. The vacuum cavity is processed with special materials, combined with 12 years of vacuum design and technology accumulation, ensuring the vacuum oil pump configuration reaches 7*10-1pa and the vacuum dry pump achieves 2pa.