Technical Analysis of the Manufacturing Process of Diffused Silicon Sensors

As a key device in the field of industrial measurement, the core component of the PT-PT115 pressure transmitter, the diffused silicon sensor, has a manufacturing process that directly affects product performance. This article provides an in-depth analysis of the technical differences among diffused silicon sensors from different places of origin, helping technical evaluators understand the core parameters of models such as DYB-HAG and TCP-TCP1 in terms of measurement range, service life, and compatibility with supporting instruments, thereby providing professional reference for equipment selection.

I. Comparison of the Core Manufacturing Processes of Diffused Silicon Sensors

The manufacturing process of diffused silicon pressure sensors is mainly divided into four key stages: wafer preparation, photolithography and etching, ion implantation, and packaging and testing. The technical differences among manufacturers from different places of origin in these stages directly affect the performance of the final product:

• Wafer preparation:Japanese manufacturers mostly use 6-inch monocrystalline silicon wafers, with a crystal defect rate lower than 0.1%, while mainstream domestic manufacturers currently generally use 4-inch silicon wafers, with the crystal defect rate controlled within 0.3%
• Ion implantation process:German brands usually use high-energy ion implanters (above 200keV), and the doping concentration uniformity can reach ±2%, which is directly related to the long-term stability of the ZD-803 pressure transmitter
• Temperature compensation technology:American manufacturers mostly use laser trimming technology, and the temperature drift coefficient can be controlled within ±0.02%FS/℃, which is significantly better than the traditional resistor network compensation method

II. Analysis of Differences in Key Performance Parameters by Place of Origin

When selecting pressure transmitters, technical evaluators need to pay special attention to the following core parameters directly related to the place of origin:

It is worth noting that the domestic general-purpose pressure transmitter PT124B-233 rod-type air-conditioning pressure sensor has performed nearly at the level of imported products under harsh operating conditions such as petrochemical and environmental protection applications. It uses 316 stainless steel for wetted parts, covers a measurement range from 0～0.01MPa to 0～250MPa, and has a temperature compensation range of 0～70℃.

III. Compatibility Considerations for Supporting Equipment

In practical applications, equipment such as the LXB-184 pressure transmitter needs to form a complete measurement system together with supporting instruments. Sensors from different places of origin show obvious differences in signal output characteristics:

1. Output signal type:European and American products mostly provide 4～20mA+HART protocol, while Japanese products tend toward 0～10VDC analog output
2. Interface standard:JK-180 supporting equipment usually requires M20×1.5 or G1/2 male threaded interfaces, so mechanical compatibility needs to be confirmed in advance
3. Power supply requirements:Domestic equipment generally supports 9～36VDC wide-voltage input, making it more adaptable than the 24VDC±10% of European and American products

IV. Selection Recommendations and Industry Application Guide

Based on the test data of mainstream models such as PT-PT500 and ZC-316, we provide the following professional recommendations for different application scenarios:

1. Selection for harsh industrial environments

In high-temperature and high-pressure scenarios such as thermal power generating units and petrochemical applications, priority should be given to the JF-JF316 pressure transmitter with a fully welded structure. Its 316 stainless steel housing can effectively resist hydrogen sulfide corrosion, and its stability can reach ±0.1%FS/year.

2. Precision measurement requirements

For scenarios such as laboratory pressure calibration, it is recommended to choose the original genuine PT-PT115, whose 0.1%FS combined error together with a response time of ≤5ms can meet the needs of the vast majority of precision measurement applications.

3. Cost-sensitive projects

For civilian fields such as building automation and constant-pressure water supply, the domestic general-purpose pressure transmitter PT124B-233 offers clear cost-performance advantages. It provides multiple range options and is convenient for user commissioning, making it especially suitable for bulk procurement projects.

V. Technical Summary and Procurement Recommendations

Through comparative analysis, it can be seen that the performance differences of diffused silicon pressure sensors mainly stem from three key dimensions of the manufacturing process: material purity (such as silicon wafer grade), processing precision (photolithography linewidth), and packaging technology (laser welding sealing performance). When selecting models, technical evaluators should focus on the following:

• Require suppliers to provide third-party inspection reports, especially long-term stability test data
• Conduct on-site inspections of the manufacturer's wafer production line and aging test workshop
• Give priority to products that provide complete traceability certificates, such as the original genuine PT-PT115 pressure transmitter

As a professional pressure sensor manufacturer, Xi'an Shenghongchuang Instrumentation Co., Ltd. has seen its products widely used in fields such as power station operation inspections and locomotive braking systems. If you need a detailed technical parameter comparison table for models such as DYB-HAG and TCP-TCP1, please feel free to contact our technical consulting team for professional selection support.