The relationship between the Japanese yen slump and SMT PARTS Recently, the Japanese yen has dropped significantly, and many people have been buying Japanese products like crazy. In the SMT industry, it is also more favorable to buy Japanese original Panasonic, FUJI, Yamaha, JUKI and other brands of feeders, nozzles, SMT mounter parts and other products. Due to the depreciation of the yen, the price of these products will be relatively lower when purchased in US dollars or Chinese yuan. If you are in need of these products in the near future, you are welcome to inquire with ZK Electronic Technology Co. Ltd. by sending an e-mail to the following e-mail address: Connie: fhysmt@hysmt.cn Becky: becky@hysmt.cn Of course, there are several other factors to consider when purchasing these products besides the exchange rate factor: Transportation and Duty Costs: Importing products from Japan may involve transportation and duty costs, which may increase the overall purchase price. However, if you buy directly from China with ZK Electronic Technology, we have cooperated with freight forwarders for many years, we will provide you with the best DHL, FedEx, UPS and special line double clear tax shipping quotes. Product quality and after-sales service: Ensure that the products you buy are genuine, ZK Electronic Technology has been insisting on quality reporting for more than 10 years, and has a team of engineers to provide relevant after-sales service policies to ensure that our customers can get timely technical support and maintenance services in the process of use.

QA sampling criteria and quality definition methods in SMT QA sampling criteria and quality definition method in SMT A customer complaints (20%) 1 no complaints and any serious feedback in the month, full marks. 2 1 case of complaints in the month deducted 10 points, 2 cases of complaints 0 points Discipline (15%) 1 No violation of company labor discipline, full marks. 2 Unexcused lateness and early departure deduct 5 points 3 without authorization, unauthorized absence from work deducted 5 points 4 work to do things unrelated to work deduct 5 points Three line management (15%) 1 to meet the requirements of the program documents, without any adverse items, full marks 2 does not meet the requirements of the program documents, random audit found a bad project deduct 5 points Work efficiency (10%) 1 timely and accurately complete the reasonable tasks explained by the supervisor, full marks 2 unexplained inability to complete the reasonable tasks of the supervisor, are deducted from 5 points V. Team spirit (10%) 1 Be able to take the initiative to help new employees, assist others/other departments to complete the task, full marks 2. 5 points will be deducted for failure to cooperate with reasonable requests for assistance from supervisors or other departments. Communication and presentation skills (10%) 1 If a problem is reported and communicated in a timely manner, and if the problem is reflected in a clear and understandable manner, full marks. 2 5 points will be deducted for failing to report and communicate problems in a timely manner. 3 5 points will be deducted if there is a serious discrepancy between the problem and the actual situation. VII 5s (10%) 1 Correct use and maintenance of equipment, reports and records are clear, full marks. 2 Damage to instruments and equipment, stationery/tools are not returned to their place, 5 points will be deducted. 3. 5 points will be deducted if the report is not filled out in time, not clear, or if it is not signed or altered. Pass rate (10%) 1 Individuals with products monthly pass rate ≥ 99.5%, full marks 2 Personal products monthly pass rate ∠ 99.5%. 0 points. The definition standard of QA and the quality definition standard in SMT have been introduced.

Six Sigma Definition Six Sigma a.k.a.: 6σ, 6Sigma, 6Σ Sigma (Σ, σ)[1][2] is a Greek letter that is a statistical unit used to measure the standard error in a total number. Its meaning is derived to mean that the defect rate of an average company is about 3 to 4 sigma, which, in terms of 4 sigma, is equivalent to 6,210 errors per million opportunities. If a company continually pursues quality improvement to the extent that it reaches 6 sigma, its performance will be close** to meeting customer requirements, with only 3.4 defective items found out of a million opportunities. The Six Sigma (6σ) concept, as a quality management concept, was first proposed by Bill of Motorola in 1986, with the aim of designing a goal: to reduce the number of defects in products and processes in the production process, to prevent product variation, and to improve quality. Really popular and developed, is the practice of General Electric Company, that is, the 1990s developed 6 σ (sigma) management is summarized in the successful experience of quality management, distilled the essence of which the process management skills and * proven methods, to become a kind of management model to improve corporate performance and competitiveness. The management method in Motorola, General Electric, Dell, Hewlett-Packard, Siemens, Sony, Toshiba and many other multinational enterprises has proved to be fruitful. For this reason, some domestic departments and organizations vigorously push 6σ management in domestic enterprises and guide them to carry out 6σ management. With the accumulation of practical experience, it has been derived from a mere process optimization concept to a management philosophy. It is not only a standard to measure the capability of business processes, not only a set of methods for continuous optimization of business processes. The Greek letter σ (pronounced SIGMA, capitalized as Σ) is a unit in statistics that represents the standard deviation from the mean. The Six Sigma (SIXSIGMA) quality level indicates that there are only 3.4 defects in a million opportunities for defects in a production or service process, i.e. a pass rate of 99.9997% is achieved. The implementation of Six Sigma quality plan requires management intervention, and by specially trained internal Six Sigma quality plan staff and project leaders to organize and implement, in order to achieve the short-term goal of reducing deviations and improving process capability and the long-term goal of achieving the world** level of Six Sigma. Six Sigma is the enterprise to refine the scientific management of a quality goal, this quality goal is the enterprise within the various departments to work together to be able to achieve the overall. Motorola and General Electric and other companies to implement the achievements of Six Sigma, but also within the business sector hundreds of thousands of impact on product design, production, service, one by one to improve the results of efforts. The Six Sigma approach has affected dozens of management processes and transaction flows. For example, in customer support and product delivery, a better understanding of customer needs and improvements in evaluation systems have enabled us to take greater strides in pursuing service improvements and timely product delivery.

The three main elements that determine the quality of SMT screen printing In SMT, a typical PCB (Printed Circuit Board) may have several hundred components and 600 to 1,000 coupling points (i.e. pad pads) on it. The solder failure rate at these endpoints must therefore be kept to a minimum. In general, 60% of PCBs that fail testing and have to be reworked are due to poor solderpaste silkscreen quality.    Below, we will discuss the fundamentals of screenprinting and explore the techniques required to consistently ** screenprint quality in production.    There are three key elements in solder paste screen printing, here called the three S's: Solderpaste, Stencils, and Squeegees. The right combination of these three elements is the key to consistent screen quality.    Elements that determine the quality of SMT screen printing I: Solder Paste (the first S)   Solder paste is a combination of solder beads and rosin, the function of which is to remove oxides from component pins, pads and beads during the first stage of reflowing in the soldering oven, which lasts about three minutes at 150°C. (Resin is sometimes called rosin. (Resin is sometimes called rosin, and technically, resin is a natural product while rosin is man-made.) Solder is an alloy of lead, tin and silver that is reflowed in the reflow oven** at about 220°C. The silver and rosin both play a role in helping to melt the solder. Both silver and rosin play a role in helping to melt the solder and wetting to achieve reflow, i.e. the role of the flux. (Wetting: is a descriptive term for the effect of soldering, where the object being soldered appears to be "wetted" by the tin.)    Spherical solder particles are manufactured into a variety of mixed sizes, and then screened and graded. Solder paste is graded according to the size of the beads, as follows:    Type 2: 75-53mm    Type 3: 53-38mm    Type 4: 38-25mm (m=micron=0.001mm) The Law of Three Balls    The Law of Three Balls gives production a simple formula for selecting a silkscreen stencil; the size of the solder bead in the solder paste must match the silkscreen stencil, as described below:    Empirical formula:    At least three *large diameter tin beads can be lined up vertically in the thickness direction of the screen printing stencil.    At least three *large diameter beads can be aligned horizontally across the width of the *small holes in the screen printing template.   The calculation is slightly more complicated because the beads are measured in metric microns (m), while the industry standard for the thickness of screen printing templates is the US-specific unit thou!    (1mm=1x10-3mm,1thou=1x10-3inches,25mm?1thou.)    Solder Paste Type 3x*Large Bead Size *Close Stencil Thickness    Type 2: 75-53m 3x75m=225m=9.0thou 9 thou    Type 3: 53-38m 3x53m=159m=6.4 thou 6 thou    Type 4: 38-25m 3x38m=114m=4.6 thou 4 thou   The size of the silk-screened hole is determined by the component pin spacing (pitch), and the size of the pad is generally half the pin spacing. (The size of the silkscreen hole may actually be a little smaller than the size of the pad.) For example, for a 25 thou (0.63mm) spacing, the silkscreen hole is 12.5 thou. Therefore, the solder paste must be selected to meet the *smallest* silkscreen hole on the silkscreen stencil:    Component *Small pin spacing *Small silkscreen hole Suitable solder paste type    16 thou 8 thou Type 2: 75-53m    12 thou 6 thou Type 3: 53-38m    8 thou 4 thou Type 4: 38-25m    Therefore, the thickness of the silkscreen stencil is usually the deciding factor, and for most applications the standard 6 thou thick silkscreen stencil with type 3 solder paste is selected. Viscosity   Viscosity is an important characteristic of solder paste, from the dynamic aspect, in the screen printing stroke, the lower its viscosity, the better the mobility, easy to flow into the screen printing holes, printed on the PCB pads. From the static side of the consideration, silk screen after scraping, solder paste stays in the silk screen hole, its viscosity is high, it maintains the shape of its filling, and will not collapse downward, which is more important for waiting for the patch before the silk screen in the pads of the solder paste.   The viscosity of the paste in its container tank is measured using a delicate and often expensive laboratory viscometer. Standard viscosities are in the range of about 500kcps-1200kcps, with a more typical 800kcps being ideal for stencil screen printing. A more practical and economical method of determining whether a solder paste has the correct viscosity is as follows:   Stir the paste with a spatula inside the container jar for about 30 seconds, then pick up some paste, three or four inches above the container jar, and let the paste drip down on its own; it should slide down like thick syrup at first, then break off in sections to fall into the container jar. If the paste can not slide down, it is too thick, if it has been falling with