barcode reading using c#.net QUALITY ASSURANCE OF FLEXIBLE CIRCUITS in Software

Generating Denso QR Bar Code in Software QUALITY ASSURANCE OF FLEXIBLE CIRCUITS

QUALITY ASSURANCE OF FLEXIBLE CIRCUITS
QR Code Reader In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Printing Quick Response Code In None
Using Barcode creation for Software Control to generate, create QR Code image in Software applications.
67.8.5 Flying Leads The appropriate places for inspection of flying leads depend on the manufacturing process of the circuits. Flying leads should be inspected just after they are generated by copper etching or by engraving of the substrate. Both AOI inspection and dimensional measurement are required. Usually, flying leads have a severe dimensional allowance for both line-width and pitches for reliable termination.
QR Code JIS X 0510 Recognizer In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
QR Code Encoder In C#
Using Barcode creation for .NET framework Control to generate, create QR Code image in .NET applications.
67.8.6 Electrical Testing (Opens/Shorts) The electrical function is the basic and most important performance of the circuit. Unfortunately, the reliability of manufacturing processes for high-density flex circuits has not been established perfectly.There are many possibilities to cause further damage to the traces after the etching process and the AOI process, and therefore a 100 percent electrical test is necessary at the end of manufacturing to guarantee the circuit s performance. This is similar in objective to rigid, bare-board testing, and Chaps. 36 to 38 provide a detailed discussion of these issues. Certainly, final electrical tests must not cause any additional damage to the fragile, fine traces. The best solution is a non-contact electrical test. An appropriate design of non-contact sensors combining flash probe, flash shock, common flash, and surface probe of OHT can reduce the total inspection cost. A suitable circuit pattern should be arranged at the beginning. The inspection should be conducted before blanking for handling convenience when final circuits are very tiny.
QR Code ISO/IEC18004 Creation In VS .NET
Using Barcode generation for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
Print Denso QR Bar Code In .NET
Using Barcode drawer for .NET framework Control to generate, create Denso QR Bar Code image in .NET framework applications.
67.8.7 Physical Properties (Final Properties) The properties of raw materials do not represent final properties of the circuits. They undergo change during the manufacturing process, and therefore final properties should be measured at the end of the manufacturing process. Generally, most of electrical, mechanical, and chemical properties are different from those of raw materials. Critical properties such as flexing endurance, insulation resistance, and heat resistance should be measured carefully. IPC-TM-650 indicates a flexing endurance test method based on a flexing mode, as shown in Fig. 67.3.Unfortunately, the test method takes a very long time (sometimes more than a month) to give a final result by conductor failure. JIS-C5016 indicates an alternative test method called the MIT test, as shown in Fig. 67.4. This method does not require more than 1 hour for one test. It is not specified by a public industrial standard, however, a new flexing endurance test method for the spiral wiring illustrated in Fig. 67.5 has been required by the mobile equipment manufacturers such as notebook computers or clamshell type cellular phones.
Painting QR Code JIS X 0510 In VB.NET
Using Barcode maker for VS .NET Control to generate, create QR Code JIS X 0510 image in .NET framework applications.
Create EAN / UCC - 14 In None
Using Barcode drawer for Software Control to generate, create EAN128 image in Software applications.
FIGURE 67.3 IPC test method for flexing endurance.
Printing Code-128 In None
Using Barcode printer for Software Control to generate, create Code 128 Code Set A image in Software applications.
Encode ANSI/AIM Code 39 In None
Using Barcode creation for Software Control to generate, create ANSI/AIM Code 39 image in Software applications.
PRINTED CIRCUITS HANDBOOK
Barcode Generator In None
Using Barcode generator for Software Control to generate, create bar code image in Software applications.
EAN-13 Encoder In None
Using Barcode generation for Software Control to generate, create EAN-13 Supplement 5 image in Software applications.
FIGURE 67.4 JIS-C5016 MIT test method for flexing endurance. R is the radius of the bend during the test symbol for theta is the angle from vertical.
2/5 Industrial Drawer In None
Using Barcode generation for Software Control to generate, create C 2 of 5 image in Software applications.
Printing EAN-13 In .NET
Using Barcode generation for Reporting Service Control to generate, create GS1 - 13 image in Reporting Service applications.
FIGURE 67.5 Flexing endurance test for spiral wiring.
Encoding Bar Code In None
Using Barcode maker for Office Word Control to generate, create barcode image in Word applications.
Make Barcode In None
Using Barcode creator for Microsoft Word Control to generate, create bar code image in Word applications.
67.8.8 Cosmetic Quality There is no perfect automatic inspection system that can detect all cosmetic defects. Visual inspection at high magnification is the most reliable inspection method of eliminating all kinds of defects in high-density flex circuits. A stereomicroscope with high magnification helps the inspection procedure, but inspectors need training with exact criteria sample books. A final audit to confirm the level of the inspections is also recommended. MIL-STD-105 could help to reduce number of samples for the audit.
Print EAN / UCC - 13 In Visual C#
Using Barcode generator for Visual Studio .NET Control to generate, create EAN 13 image in .NET framework applications.
Painting DataBar In Java
Using Barcode drawer for Java Control to generate, create DataBar image in Java applications.
67.9 STANDARDS AND SPECIFICATIONS FOR FLEXIBLE CIRCUITS
ANSI/AIM Code 128 Maker In .NET Framework
Using Barcode maker for .NET Control to generate, create Code 128A image in .NET framework applications.
Draw Data Matrix In Objective-C
Using Barcode creator for iPhone Control to generate, create Data Matrix image in iPhone applications.
Most of the major standards associations have generated new standards or upgraded existing ones for flexible circuits. Major flexible circuit standards and relating standards are listed in the following sections. 67.9.1 IEC
IEC 249-2-15: Flexible copper-clad polyimide film of defined flammability grade IEC 326-7:Specification for single- and double-sided flexible printed boards without throughhole connections
QUALITY ASSURANCE OF FLEXIBLE CIRCUITS
IEC 326-8: Specification for single- and double-sided flexible printed boards with through hole connections IEC 326-9: Specification for multilayer flexible printed boards with through-hole connections IEC 326-10: Specification for flex/rigid double-sided printed boards with through-hole connections IEC 326-11: Specification for flex/rigid multilayer printed boards with through-hole connections
Copyright © OnBarcode.com . All rights reserved.