TWI681700B - Circuit board wet process monitoring system - Google Patents

Abstract

A circuit board wet process monitoring system includes a monitoring host and a measuring device. The monitoring host has a microprocessor, a comparison unit, a recording unit and a display unit; the comparison unit, recording unit and display unit are connected to microprocessor; the measuring device is installed at an end of a wet process equipment for measuring the electrical property of a conductive circuit of a circuit board which has been tested by a wet process equipment; the measuring device is connected to a microprocessor of the monitoring host; the microprocessor has a standard value and keeps receiving measured values from the measuring device and records the measured values in the recording unit and drives the display unit to display the measure values which are provided for a manager to determine a concentration change of a chemical solution in the wet process equipment according to the change of the measured values in order to adjust the chemical solutions appropriately and timely.

Description

Circuit board wet process monitoring system

A circuit board wet process monitoring system, especially a circuit board continuously measuring the circuit board produced by the circuit board wet process equipment, and then determining whether the circuit board is good, and can be used by the manager to infer the Chinese medicine for the circuit board wet process equipment Change the potion in a timely manner.

Circuit board wet process equipment (such as electroplating and etching) all use potions to react to the conductive circuits on the circuit board. Generally speaking, the key factor that affects the yield of conductive circuits is the concentration of the potion. When the potion is used for a certain period of time , Will decrease with the increase in the number of circuit board output, resulting in defective conductive circuits, so most of the current titration method is used to regularly detect the concentration of the potion in the wet process equipment to supplement the potion in a timely manner, but this method requires a lot of The manual sampling and detection of the potion is very expensive, and this method can only maintain the stability of the potion. For the conductive circuit in the wet process equipment, the scratches, dents, etc. may cause the problem of poor conductive circuit , Could not be found in time.

The main purpose of the present invention is to use the monitoring system to monitor the conductive circuit on the circuit board produced by the wet process equipment, and then determine whether the circuit board is a good product, and the change state of the liquid medicine in the wet process equipment, so that the liquid medicine can be timely controlled Make adjustments.

To achieve the above purpose, the circuit board wet process monitoring system of the present invention is provided with a monitoring host and measuring equipment. The monitoring host has a microprocessor, a comparison unit, a recording unit and a display unit, and the comparison unit, the recording unit and the display unit The unit is connected to the microprocessor; the measuring equipment is provided at the end of the wet process equipment for measuring the circuit characteristics of the conductive circuit on the circuit board completed by the wet process equipment, and the measuring equipment is connected to the micro-processing of the monitoring host Device.

The microprocessor of the aforementioned monitoring host is provided with a standard value, and continuously receives the measured value of the circuit characteristic measured by the measuring device, and records the measured value in the recording unit and displays it on the display unit for the administrator The change of the measurement value infers the change of the concentration of the liquid medicine in the wet process equipment, and adjusts the liquid medicine in a timely manner. Furthermore, when the microprocessor receives the measurement value measured by the measurement equipment, the comparison unit will The measured value is compared with the standard value set by the microprocessor. When the measured value does not meet the compared value, the circuit board represented by the measured value is judged to be a defective product.

In the foregoing circuit board wet process monitoring system, the measured value measured by the measuring device is the impedance value of the conductive circuit.

In the foregoing circuit board wet process monitoring system, the measured value measured by the measuring device is the conductive value of the conductive circuit.

In the foregoing circuit board wet process monitoring system, the measured value measured by the measuring device is the current value of the conductive circuit.

In the foregoing circuit board wet process monitoring system, when the microprocessor of the monitoring host records the measured value in the recording unit, it also records the types of potions used in the wet process equipment in the recording unit.

Please refer to the first figure, as can be clearly seen from the figure, the present invention is provided with a monitoring host 1 and a measuring device 2, wherein:

The monitoring host 1 has a microprocessor 11, a comparison unit 12, a recording unit 13, and a display unit 14. The comparison unit 12, the recording unit 13, and the display unit 14 are connected to the microprocessor 11.

The measuring device 2 is installed at the end of the wet process equipment or on the conveying device for the wet process equipment to transport the circuit board. After the circuit board is completed by the wet process equipment, the circuit characteristics of the conductive circuit on the circuit board are measured. And the measuring device 2 is connected to the microprocessor 11 of the monitoring host 1.

When the invention is in use, a standard value is first input to the microprocessor 11 of the monitoring host 1. This standard value is obtained by measuring the conductive circuit on the circuit board processed by the wet process equipment. The type of measurement may be The impedance value, conductivity value or current value of a conductive circuit. After the wet process equipment has processed the circuit board, the measuring device 2 will measure the conductive circuit on the circuit board and send the measured value to the microprocessor 11 of the monitoring host 1, and the microprocessor 11 When receiving the measured value measured by the measuring device 2, the comparing unit 12 will compare the measured value with the standard value set by the microprocessor 11, when the measured value does not match the compared value , That is, the circuit board represented by the measured value is determined to be defective. The aforementioned measurement value type must correspond to the standard value, that is, the standard value is the impedance value, and the measurement value is also the impedance value.

Furthermore, when the microprocessor 11 of the monitoring host 1 receives the measurement value transmitted by the measurement device 2, it will continuously record the measurement value in the recording unit 13 and display it on the display unit 14 for the administrator to measure the value The change of the measured value infers the concentration change of the liquid medicine in the wet process equipment, and adjusts the liquid medicine in a timely manner.

In addition, when the microprocessor 11 of the monitoring host 1 records the measurement value in the recording unit 13, it also records the type of potion used in the wet process equipment in the recording unit 13.

1‧‧‧Monitoring host 11‧‧‧Microprocessor 12‧‧‧ Comparison unit 13‧‧‧ Recording Unit 14‧‧‧Display unit 2‧‧‧Measurement equipment

The first figure is a block diagram of the present invention.

1‧‧‧Monitoring host

11‧‧‧Microprocessor

12‧‧‧ Comparison unit

13‧‧‧ Recording Unit

14‧‧‧Display unit

2‧‧‧Measurement equipment

Claims (5)

A circuit board wet process monitoring system includes: a monitoring host with a microprocessor, a comparison unit, a recording unit and a display unit, the comparison unit, a recording unit and a display unit are connected to a microprocessor; a measurement device, It is installed at the end of the wet process equipment for measuring the circuit characteristics of the conductive circuit on the circuit board completed by the wet process equipment, and the measuring equipment is connected to the microprocessor of the monitoring host; the microprocessor of the monitoring host is set There is a standard value, and the measured value of the circuit characteristics measured by the measuring device is continuously received, and the measured value is recorded in the recording unit and displayed by the display unit, for the manager to infer the humidity from the change of the measured value The concentration of the medicine in the process equipment changes and adjusts the medicine in a timely manner. Furthermore, when the microprocessor receives the measurement value measured by the measurement equipment, the comparison unit will compare the measurement value with the microprocessor. The set standard value is compared. When the measured value does not meet the compared value, the circuit board represented by the measured value is judged to be a defective product. The circuit board wet process monitoring system according to claim 1, wherein the measurement value measured by the measurement device is the impedance value of the conductive circuit. The circuit board wet process monitoring system according to claim 1, wherein the measured value measured by the measuring device is the conductive value of the conductive circuit. The circuit board wet process monitoring system according to claim 1, wherein the measurement value measured by the measurement device is the current value of the conductive circuit. The circuit board wet process monitoring system as described in claim 1, wherein when the microprocessor of the monitoring host records the measured value in the recording unit, it also records the types of potions used in the wet process equipment in the recording unit .

Images