On April 18th, Hebei Kreisi Optoelectronic Technology Co., Ltd. officially applied for the listing of the New Third Board. The listing information disclosed by the National Stock Transfer System shows that Kreis was established on April 5, 2012, in 2016. On the 9th, the share reform was completed. Chairman Niu Bao and Chairman of the Supervisory Committee Xu Lijing together accounted for 95.00% of the shares, which is a common actual controller. The net profit of Kris in 2014 and 2015 was -15.82 million yuan and 3.072 million yuan respectively. In 2015, the net profit turned losses into profit. According to the announcement, the operating income of Kris in 2014 and 2015 was 2,788,800 yuan and 19,192,300 yuan respectively; the net profit was 158,200 yuan and 3,702,200 yuan respectively. According to the information, Kris is mainly engaged in the research and development, production, sales and installation of LED lighting products. At present, the main products of Kris are divided into three categories: LED lighting, LED intelligent lighting and LED cloud purification. They are mainly used in municipal lighting, industrial park lighting, indoor and outdoor lighting of large enterprises. The sponsoring broker of this listing application is New Times Securities, the legal consultant is Beijing Dehong Law Firm, and the financial audit is Daxin Certified Public Accountants (special general partnership). Usually,10 & 20 layers PCB are HDI board,but some are not .Some with big trace width and space,holes are over 0.3mm too. We have much experience in doing 10 Layer PCB & 20 layer PCB. 10 Layer PCB 10 layer PCB 10 layer TG170 PCB 10 layer design Storm Circuit Technology Ltd , https://www.stormpcb.com
A ten-layer board should be used when six routing layers are required. Ten-layer boards, therefore, usually have six signal layers and four planes. Having more than six signal layers on a ten-layer board is not recommended. Ten-layers is also the largest number of layers that can usually be conveniently fabricated in a 0.062" thick board. Occasionally you will see a twelve-layer board fabricated as a 0.062" thick board, but the number of fabricators capable of producing it are limited..
High layer count boards (ten +) require thin dielectrics (typically 0.006" or less on a 0.062" thick board) and therefore they automatically have tight coupling between layers. When properly stacked and routed they can meet all of our objectives and will have excellent EMC performance and signal integrity.
A very common and nearly ideal stack-up for a ten-layer board is shown in Figure 12. The reason that this stack-up has such good performance is the tight coupling of the signal and return planes, the shielding of the high-speed signal layers, the existence of multiple ground planes, as well as a tightly coupled power/ground plane pair in the center of the board. High-speed signals normally would be routed on the signal layers buried between planes (layers 3-4 and 7-8 in this case).