Worltech, Inc.
Keumgkang Penterium IT B-507, Sangdaedon-dong
Jungwon-Gusungnam-Shi, Kyuggi-Do-462 901, South Korea
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Coulometric Plating Thickness Tester

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1. Precisely measures the plating thickness of single layer and multi layers
2. Can measure circular surface besides flat one
3. Can measure thick plating layer more than 35μm which is difficult to measure with nondestructive testing
4. Can store, edit, and analyze the data connecting with a PC
5. Recalls the measurement condition; there is no need to always set the plating/substrate condition whenever measurement is taken
6. Developed with user-convenience in mind
WT-CTE 700 anodically etches the plating layer on the metal by penetrating the test solution (reagent) which reacts to a certain metal into the plating on the substrate. A current goes through the reagent, the test solution, and the WT-CTE 700 constantly senses the differences of electric potential between plating and substrate. As the plating begins to be anodically deplated and the test solution reaches to the substrate, the difference of electric potential starts happening. When the plating layer is completely deplated, the difference of electric potential becomes maximum amount. At this moment, the WT-CTE 700 stops sensing the electric potential difference, and it converts and calculates the difference into measurement unit of plating thickness. As shown in the above picture, the cell fills with the reagent. An agitator stirs the test solution to prevent the particle of electrolyzed plating from precipitating and to help the WT-CTE 700 detect the difference of electric potential more accurately. To prevent the thickness value of the plating from being affected by the difference of a current, constant current device generating direct current is equipped with electric potential of electrolysis detector. The detector catches the point at which the difference of electric potential becomes the maximum. It happens when the test solution completely penetrates through the plating and reaches the substrate below the plating.
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