The change order number is document number 2024120901, and the silk screen change for thick film resistor products applies to all thick film chip resistor products of Tian'er Technology (ever ohms).
The reason for the change is that due to poor character width and line diameter matching in the old code design of Tian'er, there is a high risk of appearance defects such as font diffusion, blurring, dot pattern, filling, etc. during code printing. After multiple adjustments to the trial production process conditions, it is still unable to effectively improve the defect rate. Therefore, Tian'er has made a comprehensive change to the font to improve the appearance yield of Tian'er products and reduce the probability of customers' AOI appearance judgment NG after PCB placement and furnace due to code defects.
The change document for the screen printing of Tian'er thick film resistors is as follows:
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