How does surface capacitive touch technology drive a new revolution in human-machine interfaces? （1） 5

The mass production yield needs improvement.  PCT technology inherently possesses the advantage of multi-touch, which is why almost all focus has been on PCT since the iPhone's launch. The touch industry, including touch panel manufacturers, IC design companies, and solution developers, has invested significant resources in its development. However, to this day, the market still offers few PCT products, primarily due to the overall low production yield, which keeps costs high.  The reasons for the low yield include: existing PCT controllers are still immature and lack sufficient self-adaptation capabilities across different application environments. As a result, touch menus remain unstable, necessitating strict limits on PCT panel characteristics (e.g., internal resistance and capacitance values) to minimize variability. Due to the limitations of PCT controllers, the stringent requirements for PCT panel consistency are often the main cause of low yield.  diode

Patent Issues (Bold Song)  As many fundamental gestures and multi-touch functionalities have been patented and approved by certain manufacturers, the multi-touch advantages of PCT products cannot be fully utilized in many application areas (especially the dominant mobile phone market)! Overall, the PCT solution, due to its multi-touch advantages, is bound to secure a place in the market in the future. However, given the current situation, it still cannot be considered a mature solution.

In contrast, although SCT technology also faces the issue of capacitive signals being prone to interference in controller design, through the continuous efforts of IC designers, the SCT solution can now be widely applied in various environments. For example, the SCT touch IC (WT5750F) developed jointly by Worldsemi and Wanda Optoelectronics, through various built-in adjustment mechanisms within the IC, can effortlessly overcome differences in external environments and touchscreen sizes, delivering stable high-quality touch experiences. Additionally, to meet the demand for miniaturization in handheld devices, Worldsemi's SCT touch IC has made significant strides in enhancing product integration, thereby simultaneously addressing both the critical requirements of miniaturization and cost reduction.   diode