Online test screen printing wet weight of functional significance for crystalline silicon solar cells production monitoring

Polaris solar PV net news: in the production of crystalline silicon solar cells printed, online test printing function of wet weight for both traditional printing equipment down time measurement can be avoided printing wet weight impact on the production, and provide on-site technical staff monitors the production line running provides a technical means. In the print production process in the future to improve equipment utilization and to collect real-time printing data play an important role.

1, printing equipment in the monitoring on the market today printing problems faced by wet weight

Under normal circumstances, in crystalline silicon solar cell technology in the production process in order to understand the State of crystalline silicon solar cells printed quality, in a specified time period to monitor the print aspect ratio of wet weight, and grid lines and measurements. As we all know, traditional screen printing equipment currently on the market use in each monitoring must be to pause printing equipment, and then manually add test wafers, printing of data measurements. If printing wet weight monitoring every half an hour, will result in about 1 minute of downtime. Provisions such as a factory site once every 30 minutes to the current print quality control, each device each time will lead to 1 minute of downtime. 20 hours a day and loss of production time will be because the process control 20*2=40 minutes, if calculated according to the capacity of 1400 pieces per hour, each device will vary by data-collection capacity loss of about 900. If you have 8 lines of workshop, will be printed daily wet weight loss 900*8=7200 loss of capacity for data collection. If you are using the print device is a 4-bit, it will lose more production (about 28000).

If printing equipment with 4 printing table, and every time you want to print on each table measured wet weight, if no print parameters to adjust each wafer wet weight after weight testing to printing before printing test takes 1 minute, 4 takes about 4 minutes after the end of the test.

For c-SI solar cell producers, printing process stability is directly related to the solar cell product quality stability. Thus, each company applies quality management techniques to monitor the printing process the data related to the trend. However, due to the drawbacks of traditional print design, timing data acquisition will be great impact on production, we often find that many need to monitor the data either on the production line is made up of employees or employees in order to achieve the production targets are not monitored.

2, tested of JRT user-friendly online printing wet weight design

Test print is about problems in order to avoid downtime, JRT in online testing next-generation printing equipment integrated wafer printing function of wet weight.

Online test screen printing wet weight of functional significance for crystalline silicon solar cells production monitoring

Figure 1 wet weight of test function integrated in the device online real photos

Realize the fundamentals of online testing solar cell printing wet weight:

In equipment of printing processes Shang material segment and Xia material segment integrated two a specifically for test wet heavy design of drawer, as Figure 1 by shows, operation employees will advance said heavy good of wafer into printing Qian of Shang material drawer (loadingdrawer), select specifies test of press (such as Printer1), wafer will will automatically transport to developed of press (Printer1) completed printing, zhihou automatically entered Xia material drawer, led bright up, reminded operation personnel removed completed printing of wafer. (The exact schematic is shown in Figure 2) the last manual measurements calculated printing wet weight. During the test device will not stop production because of the measured wet weight and operating employees in the production process in accordance with the factory set monitoring time put Silicon on time in wet weight monitor drawer you can quickly access each press on current print wet weight.

Online test screen printing wet weight of functional significance for crystalline silicon solar cells production monitoring

Figure 2: analog monitor printer (Printer1) wet weight of the printing process

Field operations staff, you also need to spend time in silicon wafer weigh. If it happens to appear some time printing quality problems, and measure the mass wafer operators are doing work, failed to stop in time, there will be possibility of poor printing solar cells. Given the existence of these problems, JRT printing devices can also function of automatic weighing, printing wet weight measurement will not only avoid the downtime effects on yield, and avoids on-site operations staff when wafer weigh in on lax regulation of printing equipment, achieved the goal of printing production real-time monitoring.

Specific equipment achieved process as Figure 3 by shows, operation employees will wafer into printing Qian of Shang material drawer (loadingdrawer), select specifies test of press (such as Printer2), wafer will will automatically transport to integrated in equipment in of electronic said Shang for said heavy, completed said heavy Hou, wafer was transmission to developed of press (Printer2) completed printing, zhihou automatically entered Xia material segment electronic said heavy completed said heavy Hou, wafer was transfer to Xia material drawer in, Indicator lights up to remind the operator pulled out after printing Silicon. Test printing wet weight will be recorded in the computer, specific values will be displayed in the user interface.

Online test screen printing wet weight of functional significance for crystalline silicon solar cells production monitoring

Figure 3 automatic feeding and discharging end of silicon wafer weigh and will print the actual weight displayed on the operations screen

3, online printing of wet weight monitoring function on the actual production of meaning

Online test screen print function of wet weight, avoiding conventional printing equipment needs to stop testing the effect of improved equipment utilization, reduces the cost of enterprise average.

Secondly, technology workers, in daily Web version of the experiment, slurry tested in the work of other processes, such as optimization, online test screen printing wet weight functions can be in does not affect the production of case for process analysis to provide additional printing data, facilitate future process improvements and experiments.

With the advancement of device intelligence, online test screen print function of wet weight must be the necessary functions of c-SI solar cell printing equipment, in crystalline silicon solar cell production in the future, it will play a pivotal role.

Original title: online test screen printing wet weight of functional significance for crystalline silicon solar cells production monitoring

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