KSA BandiT real-time substrate temperature testerAs a key temperature measurement device in semiconductor manufacturing, it is necessary to simultaneously monitor the temperature dynamics of multiple substrates in processes such as substrate growth and polishing. The synchronous monitoring of multiple substrates is achieved through a three-layer architecture of "distributed sensing array+synchronous signal transmission+centralized data processing", which balances detection accuracy and real-time performance, providing reliable data support for process optimization.

1、 Distributed sensing array: multi-point parallel sensing foundation

The core of the instrument lies in a distributed sensing layout designed for multi substrate scenarios, which enables parallel acquisition of temperature signals

Customized sensing unit deployment: According to the number of substrates and placement spacing, a corresponding number of micro temperature sensing units are configured in the detection area. The sensing units use thermocouples or high-precision resistance temperature measurement principles, and the node size is controlled within a small range to reduce interference with the process. They can also adapt to the thermal characteristics of substrates made of different materials such as silicon and silicon carbide. Each sensing unit is independently aligned with key temperature measurement points on a single substrate (such as the center and edge regions) to ensure accurate capture of single point temperature data.

Anti interference sensing design: The sensing unit integrates a shielding structure, similar to DUAL SHIELD technology's anti-interference logic, which can resist electromagnetic noise and plasma interference in the process environment, maintain signal stability under harsh conditions such as high temperature and vacuum, and avoid multi-channel data crosstalk caused by environmental factors.

2、 Synchronous signal transmission: eliminating timing deviation

Through hardware and protocol optimization, ensure that temperature signals from multiple substrates are synchronously transmitted to the processing unit to avoid data delay differences:

Parallel signal channel design:KSA BandiT real-time substrate temperature testerHow to achieve multi substrate synchronous monitoring with multiple independent signal transmission channels built in, each sensing unit corresponding to a dedicated channel, and a synchronous triggering mechanism between channels. The signal acquisition timing is controlled by a unified clock source to ensure that the temperature data of all substrates is captured at the same time node, and the timing deviation is controlled within microseconds.

Efficient data transfer link: Using low latency transmission technology, similar to the signal transmission logic of wireless temperature measurement systems, the analog temperature signals collected by each channel are converted into digital signals and uploaded in parallel through a high-speed bus to avoid queue delay caused by serial transmission and ensure the real-time performance of multi substrate data.

3、 Centralized data processing: multidimensional integrated analysis

Integrating, analyzing, and presenting multi substrate temperature data through dedicated algorithms and software platforms:

Synchronous data calibration and analysis: After receiving multi-channel signals, the data processing unit independently calibrates the raw data of each substrate based on preset calibration parameters (such as temperature coefficient, linear correction value) to eliminate systematic errors between sensing units; Then align the time axes of each substrate through a synchronization algorithm to form a multi substrate temperature dataset under a unified time coordinate.

Visualization and warning presentation: The software platform adopts a centralized interface design, which can simultaneously display real-time temperature values, temperature change curves, and temperature distribution heat maps of all substrates, similar to the temperature map presentation method of TC Wafer, intuitively displaying the temperature differences between different substrates. When the temperature of any substrate exceeds the preset threshold, the system immediately triggers an alarm and can accurately locate the abnormal substrate number.

4、 Key technical guarantee: precision and stability control

Timing synchronization guarantee: high-precision crystal oscillator is used as the clock source to ensure the consistency of multi-channel acquisition frequency. The sampling rate can reach tens of thousands of times per second and can capture transient fluctuations in substrate temperature;

Data consistency calibration: Before each startup, all sensing units are uniformly calibrated using a standard temperature source to ensure that the measurement deviation between different channels is ≤ ± 0.5 ℃;

Environmental adaptability optimization: The sensing unit and transmission link are made of high temperature resistant and corrosion-resistant materials, which are suitable for the harsh process environment in semiconductor manufacturing and ensure long-term monitoring stability.

This multi-dimensional collaborative implementation scheme enablesKSA BandiT real-time substrate temperature testerHow to achieve synchronous monitoring of multiple substrates to simultaneously and stably monitor the temperature status of multiple substrates, providing strong support for temperature uniformity control and anomaly investigation in multi station semiconductor processes, and helping to improve substrate processing yield and device performance consistency.