In the hot download of the "Touch technology special issue" of the electronic enthusiast network in October, how can you lack it!
In order to improve the added value of its Ultrabook products, the notebook brand has developed a model combining the concept of deformation and narrow frame design, which has led to an increase in the strength of the OGS panel. Therefore, the OGS panel factory is relying on the secondary strengthening process of physical and chemical methods. Overcoming the related defects and problems of secondary strengthening derivative to improve the strength of OGS panel.
With the advent of the Windows 8 operating system, the industry has carefully observed this innovative software with touch interaction as its core, and whether it has the opportunity to set off a new wave of consumer electronics demand. Especially in the application field of stylus pens, the stylus pens developed by various manufacturers are designed with the wide visual effects of light and thin, detachable flat screen, metal ultra-thin shell and narrow border screen. The trend of the first generation of stylus is the mainstream.
However, despite the obvious sense of design and differentiation of the new concept of stylus, the high sales price has become the development resistance of the recession era, and the brand players are pressing the low-cost, almost will focus on lowering the notebook components. In terms of production cost, the single-chip Glass (OGS) touch product has become the first choice for today's stylus products.
Driven by the increase in the yield of high-level flat-panel technology and the Windows 8 operating system, the market demand for consumer touch electronic products has gradually emerged. OGS touch panel business opportunities have exploded in the second half of 2012, regardless of the size of large, medium and small screens. OGS has been used extensively in mobile devices, but the key to OGS panel manufacturing is to reduce the production cost of OGS modules, simplify the number of production process stations and introduce low-cost materials.
In addition, with Apple's use of In-cell (Figure 1) touch technology on the iPhone5 product, high-end smart phone products are following up, making the touch panel market warmer ( Table 1), including thin film transistor liquid crystal display (TFTLCD) panel manufacturers (such as AUO, Innolux and Huaying) also actively grab the touch business machine pie.
Figure 1In-cellPixelDesign schematic and panel profile description
In-cell technology has the advantages of lightness, high light transmittance and power saving. However, Huangguang has a high threshold, so Apple chose In-cell to separate it from other competitors. However, In-cell still has good yield and production. There is a big problem, there should be no chance to replace the plug-in touch panel in the short term. Therefore, with the current development concept, small-sized products may use In-cell touch; but large-size panels such as 13-inch or more using OGS or TOL (TouchOnLens) technology will be a better choice.
Introduction to the front and back process of OGS products
The OGS process is a glass mother substrate (Sputter), a black matrix (BlackMatrix, BM) indium tin oxide (ITO) process, and then cut (CutTIng) and grinding process (Grinding / CNC As a small chip, the chipping of the edge of the glass is then polished by polishing.
OGS will first perform BM yellow light process in the first stage yellow light process (Fig. 2), and then carry out yellow light process of ITO and Al/Mo/Al. The thickness of metal layer (MetalLayer) is less than 4,000 (A). If dust particles occur ( ParTIcle), fiber (Fiber), poor metal film formation, etc. lead to conductive circuit defects, which will seriously affect the electrical properties of the product, resulting in scrapping and shipping.
Figure 2 OGS product front-end process flow chart
The OGS back-end process starts from the cutting start (Fig. 3). After the CNC edging, the product produces a lead angle to avoid edge damage during the user's scratch or drop test, and then put into the physical or chemical secondary strengthening process. Increase the ability of its products to test at 4PointBending. If it is chemically strengthened, it will go through the site where the acid-resistant film is removed, then go to the cleaning machine to remove the residual glue and excess hydrofluoric acid, and then check if there is any problem with the appearance, and finally go to the printed circuit board (PCB). Fit and electrical function test, fill the BM process, and then put the protective film on the front and back of the OGS product, then you can ship.
Figure 3 OGS product back-end process flow chart
From the current market trend, OGS has a tendency to approach large size, and touch products use tempered glass. The depth and price of the products are upward. Therefore, the cost of OGS products will gradually increase, and the yield problem is particularly important. The effective use of glass in the front-end process to avoid scrapping is a problem that must be paid attention to today's OGS production line.
Touch
Mobile Phone Touch Screen
Products black edge is finer and more accurate.
Perfect and exquisite pressing detail process.
Touch screen is an electronic display that can detect and respond to the touch of a user's fingers or stylus. It allows users to interact directly with the display by touching or tapping on the screen, eliminating the need for a physical keyboard or mouse. Touch screens are commonly used in smartphones, tablets, laptops, and other electronic devices to provide a more intuitive and user-friendly interface.
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Dongguan Jili Electronic Technology Co., Ltd. , https://www.ocasheet.com