JJK is a company that attaches great importance to accumulation, especially in the piezoelectric quartz crystal industry with more than 30 years of practical experience. JJK’s enterprise management ha

1. there is a large jump in the film thickness reading during the coating process.2. the crystal stops oscillating during the coating process before the normal end of crystal life.3. crystal does not

The year 2020 is destined to be an extraordinary year, with the sudden outbreak of New Crown Pneumonia having a serious impact on both our economy and society. Nonetheless, our scientists continued to

Source: Anti-Shorting Research CenterGlobal Camera Lens ManufacturersIn addition to the ultra-wide-angle and telescopic lenses that are found in many flagship models, the company has added a mid-range