Location History:
- Gunma, JP (2010 - 2012)
- Annaka, JP (2012 - 2015)
Company Filing History:
9 out of 5,984 
5 out of 1,099 
Years Active: 2010-2015
Title: Naoki Ishikawa: Innovator in Solar Technology
Introduction
Naoki Ishikawa is a prominent inventor based in Annaka, Japan. He has made significant contributions to the field of solar technology, holding a total of 9 patents. His innovative work focuses on enhancing the efficiency and performance of solar cells and related technologies.
Latest Patents
One of Ishikawa's latest patents involves a solar cell and solar-cell module. This solar cell features a passivation film formed on a crystalline silicon substrate that includes at least a p-n junction. An electrode is created by printing and heat-treating a conductive paste. The design includes a first electrode, which acts as an extraction electrode to draw photogenerated carriers from the silicon substrate, and a second collector electrode that collects the carriers from the first electrode. Notably, the second electrode only partially contacts the silicon substrate, which helps to reduce charge losses at the electrode/silicon interfaces. This innovative design improves the short-circuit current and open voltage, leading to enhanced solar cell characteristics.
Another significant patent pertains to a screen printing method that enhances accuracy during multiple screen printing steps. After printing a first layer and an alignment mark on a workpiece, the alignment mark is captured by a camera. This image is stored as data in an image processing device, which then provides reference data for subsequent printing. The method allows for the renewal of reference data, ensuring precision in the printing process.
Career Highlights
Throughout his career, Naoki Ishikawa has worked with notable companies, including Shin-Etsu Chemical Co., Ltd. and Shin-Etsu Handotai Co., Ltd. His experience in these organizations has contributed to his expertise in the field of solar technology and materials science.
Collaborations
Ishikawa has collaborated with several talented individuals, including Satoyuki Ojima and Hiroyuki Ohtsuka. These partnerships have fostered innovation and development in his projects.
Conclusion
Naoki Ishikawa's contributions to solar technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence advancements in solar energy solutions.