Formic Acid Reflux Reactor, V3DR

Feature Introduction

Welding Temperature: The actual welding temperature of the V3DR formic acid reflux furnace can reach ≤600°C.

Ultimate vacuum: ≤0.3 Pa; Operating vacuum: 5Pa-200Pa.

Uniformity of temperature: ≤±1% within the effective welding area.

Effective Welding Area: ≤300mm x 300mm

Furnace chamber height: ≤100mm.

Heating Method: Bottom and top infrared radiation heating, with a thermal plate featuring a semiconductor-grade graphite-doped silicon carbide platform. This platform is resistant to deformation over long-term use and boasts excellent thermal conductivity, ensuring a more uniform surface temperature on the thermal plate.

Rise Rate: Rise rate ≥ 150℃/min.

The V3DR formic acid reflux furnace is equipped with top heating, which not only enhances heating efficiency but also ensures more uniform platform temperature, thereby improving welding consistency and quality.

Cooling Rate: ≤200℃/min (high temperature range of -150℃ when unloaded).

Silicon Carbide Heating Platform: Utilizes a combination of air and water cooling methods to achieve rapid cooling of the heating plate, enhancing the rate of temperature decrease, and preventing device sintering due to excessive temperature difference during the cooling process.

Meets the welding requirements for various solders (≤450°C).

For example: pre-formed solder sheets such as In97Ag3, In52Sn48, Au80Sn20, SAC305, Sn90Sb10, Sn63Pb37, Sn62Pb36Ag2 (capable of eutectic welding without flux), as well as various types of solder paste.

Weld porosity rate:

The V3DR formic acid reflux furnace, after being verified by numerous customers during soft solder welding, can control the void rate below 2%.

Optional Positive Pressure Module:

Equipment can be optionally equipped with a positive pressure module ≤0.2Mpa, which can meet both positive and negative pressure process requirements. The positive pressure process can effectively address the issue of displacement of small components during welding (e.g., MiniLED, MicroLED), as well as solve the problem of solder paste flux spatter in soldering processes (e.g., lead frame products).

Temperature Control System and Temperature Measurement System

The V3DR formic acid reflux kettle utilizes advanced intelligent temperature control technology, with a temperature control accuracy of ±1°C.

The V3DR formic acid reflux furnace temperature curve can be set up to 40 segments, with 3 sets of PID (6 sets available) for precise temperature control, ensuring consistent and reliable welding. Temperature control is lag-based, while PID control offers predictive regulation, enhancing temperature control accuracy and stability.

The V3DR formic acid reflux furnace cavity is equipped with 2 sets of temperature measurement thermocouples as standard. During operation, the equipment can provide real-time feedback on the temperature at any position within the cavity and display the temperature measurement curve in real-time within the control software, ensuring better temperature control in the welding area and supporting the achievement of a favorable process curve.

Cavity atmosphere environment

The V3DR formic acid reflux furnace is capable of being filled with nitrogen inert gas to assist in welding, while also meeting the process requirements for formic acid and nitrogen-hydrogen mixed gas reduction atmosphere. The process atmosphere can be precisely controlled by either time or by an MFC mass flow controller, ensuring consistency in each set process. Suitable for welding without flux.

V3DR Formic Acid Reflux Furnace Configuration Software Control System:

The software control system is based on the Windows operating system and is easy to operate.

Process programming can be achieved through conditions such as temperature, time, pressure, and vacuum, with the software automatically controlling the entire process.

The process curve programming supports an infinite number of process actions, meeting complex process requirements.

The control system accommodates various welding process curves and allows for setting, modifying, storing, and recalling based on different processes.

The control system comes with an analytical feature that can analyze process curves, determining information such as heating, holding temperature, and cooling.

The software control system automatically records real-time welding processes and temperature control/temperature measurement curves, ensuring traceability of the device's process, and automatically stores them in the corresponding directory based on the process working time.

The V3DR formic acid reflux furnace features an all-encompassing, fully automatic cavity structure, ensuring reliability for long-term use. The lid automatically closes during operation, preventing any displacement of components and avoiding vibration that could affect焊接 quality. The single-chamber process meets both heating and cooling requirements.

Anti-finger-trapping design for operator safety.

V3DR formic acid reflux furnace, featuring an illuminated viewing window on the lid for observing the sintering process under a microscope. The lid automatically raises and lowers, with all operations except manual handling of parts being automatically controlled by the software.

The V3DR formic acid reflux furnace heating plate is made of pure material, without the addition of cold water pipes and other structures, ensuring more uniform temperature distribution.

The V3DR formic acid reflux furnace utilizes Zhongke Comrade's water cooling technology for cooling. During heating, water cooling does not affect the uniformity of the thermal field temperature. When cooling, each heating plate has six independent water cooling units, resulting in even higher temperature uniformity. It is particularly suitable for high-quality packaging welding of gold-tin eutectic and indium solder eutectic.

Unique Advantages

1. Locking Method: Automatic door locking via program

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

3. The heating tube comes with a quartz sleeve, allowing for quick and easy replacement without affecting the vacuum in the furnace chamber.

4. Specialized brackets ensure the heating tube is centrally positioned within the quartz tube, effectively extending the lifespan of the quartz tube.

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

6. The vacuum chamber is CNC integrated machined, reducing the risk of welding defects, with 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 micro-positive pressure and suitable for long-term use.

8. The vacuum cavity cooling pipeline is precision-machined as a single unit via CNC, eliminating the risk of leakage from the welding of the vacuum cavity cold water pipes.

9. The vacuum cavity is precision-machined with special materials, combining 12 years of vacuum design and process expertise, ensuring the vacuum oil pump configuration achieves 3*10^-1 Pa and the vacuum dry pump reaches 1.3 Pa.