Semiconductor Wafer Inspection System

Introduction of new surfscan SP2XP, a new monitor for wafer inspection system for the integrated circuit has built a success upon its predecessor tool with the same name. The new wafer inspection system features improved sensitivity to defects on silicone, poly and metal films. It also has the ability to sort defects by the type and size. This new semiconductor wafer inspection system also features vacuum handling and best-in-class throughput.

This system is designed and manufactured to enable facilitate chipmakers to bring in their devices to the market with superior quality and in minimal amount of time. This system has an integrated ultra high sensitivity operating mode to speed up the process of development of next generation devices.

This SP2 system is designed for 65 and 45 nm nodes and below. This slip in new UV laser technology, dark field optics and advanced algorithms. This tool is developed to continuously provide reliable and accurate defects in engineered substrates. This tool is designed to detect defect patterns of 6 nm or higher in a multilayered wafer patterns at a relatively higher speed. The false alarm rate is designed to be less than 0.5 occurrences per chip. The performance is achieved by using the optical set up and the digital design pattern data. The main function of the digital design pattern data is to isolate the defective areas into different layers, so as to facilitate the isolation of the defects. The image is processed in one pass by an image processer that has high speed pipeline structured and which can detect for defects at a video rate of 7 mega hertz.

This semiconductor wafer inspection system technology is designed to address the needs to quickly detect the defective materials so that the problem can be rectified sooner. To sooner lesser is the wafer scrap, yield loss and market delay. This technology is believed to actually improve the production of leading edge devices with minimal defects at a lesser period of time.

The advantages of the surfscan SP2XP monitor wafer inspection system include thirty six percent increases in the throughput resulting from changes in opto-mechanics, electronics and software. The multi channel architecture enables the wafer inspection system to automatically separate particles from micro scratches, voids, water marks etc. Ultra high sensitivity mode enables the system to be used for development of next generation chips. The introduction of Opto-mechanics has proved to be effective in detecting defects even over rough films. The new differential interference contrast channel enables capture of shallow, flat and faint defects which can result in failure of devices at advanced devices. The defect sizing capability enables detecting defects at higher speed with greater accuracy.

To Learn more about Semiconductor Wafer Inspection and link semiconductor wafer inspection system in the body of the article link to http://www.semisystemservices.com

Semiconductor Parameter Analyzers For Three Critical Types of Semiconductor Measurement - Part III

One of the greatest challenges associated with integrating DC I-V, capacitance-voltage (C-V), and ultra-fast I-V measurement capabilities into a single parametric test chassis is that the cabling required for each measurement type is fundamentally different. Although the cabling from the instrument to the semiconductor probe station bulkhead and feed-through is fairly straightforward, the cabling from the bulkhead to the probe tips can be confusing and difficult.

Different Cabling for Different Measurements. DC I-V measurements are made using four triaxial cables. Guarding is necessary to achieve low current I-V measurements, which makes the use of triaxial cables necessary for these measurements. The measurement signal is carried on the center conductor of the cable, the inner shield is driven as a guard for the signal, and the outer shield is used for safety to shield the user from high voltages that may be applied to the guard and signal conductors. Four cables are necessary in order to achieve a remote sense, or Kelvin, connection to allow the instrument to sense the voltage at the device accurately.

Guarding is a technique that reduces leakage errors and decreases measurement response time. Guarding consists of a conductor (shield) surrounding the lead of a high impedance signal and driven by a low impedance source. The guard voltage is kept at or near the potential of the signal voltage.

C-V measurements are made using four coaxial cables. The outer shells are connected together to control the characteristic impedance the signals see. All four cables' outer shells must be inter-connected near the DUT. Typical cabling requirements for different types of measurements are listed below.

DC I-V Measurements

? Triaxial cables

? Kelvin connections

? Isolated, driven grounds

LCR/C-V Measurements

? Coaxial cables

? Kelvin connections

? Shields connected at the probe tips

Ultra-fast I-V Measurements

? Coaxial cables

? Non-Kelvin connections

? Shields connected at the probe tips

? Shields optionally connected to a probe tip

Ultra-fast I-V measurements require the highest bandwidth of the three measurement types, so the cable must have characteristic impedance that matches the source impedance to prevent reflections off the DUT from reflecting off the source. Ultrafast I-V testing does not use a remote sense cable and is the only one of the three measurement types that connects the DUT to the outer shield of the cable.

To address the challenges created by different cabling requirements for different measurement types; a high-performance multi-measurement cabling system. These cables support I-V, C-V and ultra-fast I-V measurements. Their use reduces the burden on a test system operator, who would otherwise be forced to go through the laborious process of re-cabling connections from the instrumentation to the prober every time a new measurement type is required.

A good cabling kit maximizes signal fidelity by eliminating measurement errors that often result from poor cabling practices. When combined with a versatile parameter analyzer system, the user will be able to make the three principal types of measurement required for semiconductor devices. High-performance multi-measurement cabling is crucial for connecting various elements of a parameter analyzer to the probe manipulators on a wafer prober, especially when you need to integrate accurate ultra-fast I-V, C-V, and precision DC I-V measurements for a high throughput test system

Conclusions

Ultra-fast I-V sourcing and measurement are the latest capabilities to be added to integrated parameter analyzer systems. Modular architectures in these systems represent a cost-effective way to address new testing needs and techniques as they emerge. Multi-measurement cabling with a broad signal bandwidth is crucial for high measurement accuracy and throughput in these systems. Getting all these features and capabilities in one test system that adapts readily to the industry's changing test needs makes a semiconductor manufacturer's capital investment stretch further and improves its ROI.

Lee Stauffer is a Senior Marketer with Keithley Instruments in Cleveland, Ohio, USA, where he is responsible for developing and supporting products for the semiconductor manufacturing and research markets. His formal education in electrical engineering and semiconductor device physics is complemented by more than 20 years experience in semiconductor process and product engineering, device characterization and instrumentation design. He can be reached at 440-248-0400, or by e-mail at lstauffer@keithley.com.

The New Age of Semiconductor Devices and Microelectronics Manufacturing

Modern engineering has stepped up many levels since the introduction of electronics. Large and bulky machinery has been reduced to mere hand held devices. This has become a wide spread and innovative change in most areas of manufacturing. What is microelectronics manufacturing and how is it used in today's society?

Every time you use a cell phone or a hand held GPS device, you are using an end product made from the smarts of microelectronics. The small components used to manufacture devices like cell phones are made using a special and detailed process using semiconductor devices and thin films. These tiny parts are connected together on a circuit board that allows for consumer usage. Each board is specific to the end product.

Capacitors, transistors, resistors, and diodes are examples of commonly used microelectronic parts. These are vital to the inner workings of the electronic devices used every day all over the world. Without these tiny components, you would not be able to turn on and off your cell phone or video game. Without a resistor being present in your television, you could not control the volume.

Schooling for working in the field of microelectronics has become a big part of university studies. For those students interested in working Semiconductor Devices and the process of physical vapor deposition, knowledge about the intricate structure of the electronic device is required. Many silicon wafer suppliers and semiconductor companies have upgraded to using microelectronic technology and employees need the special knowledge required to implement processes correctly and efficiently.

Consider the importance of electronics in everyday life. Think about the doctors that rely on robotic hands for performing delicate operations and for monitoring patients during those same procedures. Many electronic devices are used for life saving procedures in the medical field. Without innovative microelectronic research, these types of devices would have never been founded. Many peoples lives depend on the biomedical device next to them in the hospital setting.

The manufacturing production of many products used every day depends on computers for swift and efficient movement. Assembly lines in plants using robotics depend wholly on computers. In each and every one of these computers are the workings of microelectronics on a motherboard. Cars, medical equipment, furniture, and even some clothing are examples of products made using newer and more technologically advanced methods that require microelectronics.

Financial and government data used to be kept on computer main frames that would fill a large warehouse. Thanks to microelectronics, that same data can be placed on tiny semiconductor devices that have much larger hard drive spaces. This data is superbly important to things like Social Security and tax refunds for citizens, so keeping it stored in a better way is a plus.

Microelectronics manufacturing using thin films is making headway and is also making life easier for everyone. Jobs that used to cost hundreds of thousands in shear man hours have been streamlined into very efficient and cost effective production methods. The technology and capabilities are exciting and seem to be limitless.

Jessica entered the Semiconductor Manufacturing field in 1998. Jessica has held positions at Integrated Micromachines and Xponent Photonics prior to founding Rogue Valley Microdevices, specializing in semiconductor devices and establishing it as one of the leading silicon wafer suppliers.

Semiconductor parameter Analyzer for three types of critical semiconductor measurement – part III

One of the biggest challenges associated with DC I-V (C-V), integration capabilities and capacity measurement ultra-fast I-V into a single parametric test that the wiring loom is necessary for each type of measure is fundamentally different. Although the wiring from the bulkhead of semiconductor probe and continuous is quite simple, the wiring from the bulkhead for the probe tips can be confusing and difficult.

Wiring for several different sizes. DC-V measurements are made using four Triaxial cables. The guard is necessary to create measures of low-current-V, which makes use of Triaxial cables are required for these measurements. The measuring signal is carried forward to the Director of the center of the cable, the inner shield is guided as a guard for the signal and the outer shield is used for security to protect you from high voltages that can be applied to the signal conductors and guard. Four cables are needed in order to reach a remote sense, or Kelvin, connection to enable you to sense the voltage to the device with precision instrument.

Guard is a technique that minimizes errors and reduces scattering response time measurement. The guard consists of a conductor (shield) surrounding the lead of a high impedance signal and driven by a low source impedance. Stress guard is maintained close to potential or voltage signal.

C-V measurements are made using four coaxial cables. The outer shells are connected between them to control the characteristic impedance of that see the signals. Outer shells all four interrelated cables must be near the DUT. Typical wiring requirements for different types of measurements are listed below.

DC I-V measurements
Triaxial cables
Kelvin connections
Isolated, driven by reasons

C/LCR Measurement-V
coaxial cables
Kelvin connections
Shields attached to probe tips

Ultra-fast I-V measurements
coaxial cables
Connections-Kelvin
Shields attached to probe tips
Shields optionally linked to a probe tip

Measurements ultra-fast I-V require higher bandwidth of three measurement, then the cable must have characteristic impedance that matches the source impedance to prevent reflections off the DUT, which reflects the source. Ultra-fast I-V Test does not use a remote sense wire and is the only one of three types of linking the DUT measurement with external cable shield.

To meet the challenges created by different requirements for different types of wiring; a multi-measurement system wiring. These cables support I-V, C-V measurements and ultra-fast I-V. Their use reduces the burden on a test system, which would otherwise be forced to go through the laborious process of wiring connections from instrumentation prober whenever a new type of measurement is needed.

A good wiring kit maximizes signal fidelity by removing measurement errors that often result from poor cabling practices. When combined with a versatile parameter Analyzer, the user will be able to carry out three main types of measure required for semiconductor devices. Multi wiring with high performance-measurement is crucial for connecting various elements of a parameter for Analyzer Probe manipulators on a wafer prober, especially when you need to integrate accurate ultra-fast I-V measurements-V DC C-V and accuracy test system for high throughput

Conclusions
Ultra-fast I-V sourcing and measurement are the latest features to add to parameter integrated Analyzer systems. Modular architectures in these systems represent a convenient way to address new needs and technical testing as they emerge. Multi Measurement wiring with a wide signal bandwidth is crucial for high accuracy and throughput in these systems. Getting all of these features and ability to test a system that easily adapts to changing test needs makes the industry section of the capital investment of a semiconductor producer and improves ROI.

Lee Stauffer is a Senior marketing with Keithley Instruments in Cleveland, Ohio, USA, where he is responsible for developing and supporting products to research markets and semiconductor manufacturing. His formal education in electrical engineering and semiconductor physics of the device is completed by more than 20 years experience in semiconductor process and product engineering, design and characterization instrumentation device. He can be reached at 440-248-0400 or via email lstauffer@keithley.comto.