Tuesday, October 6, 2009
Complete solutions for electrochemical etch-stop processes.
The electrochemical etch-stop is one of the most cost-effective, convenient and precise technique for fabricating thin, mono-crystalline silicon membranes. It is based on the different etching potentials of n- and p-type doped silicon layers in alkaline etching solutions, such as potassium hydroxide (KOH).
Two key components are needed for successful implementation of this technique:
» a reliable wafer holder that protects the n-type backside of the wafer from the etchant and that provides an electrical contact to the wafer
» a potentiostat that keeps the p/n-junction in reverse bias and monitors the current over time
AMMT offers a wide range of wafer holders and potentiostat especially adapted to electrochemical etch-stop processes for MEMS fabrication to assure highest yield and reliability. Our devices have been used in industry and research institutes worldwide for many years and have proven their high engineering quality
PS-NLL Narrow Linewidth Laser
The PureSpectrum™-NLL Narrow Linewidth Laser is a compact, ultra low noise and narrow linewidth DFB semiconductor laser module.
Features
* Linewidth < 5 kHz (@1ms )
* Low phase noise
* Long coherence length
* Output power up to 80 mW
* High frequency stability
* Based on a DFB semiconductor laser
Applications
* Remote sensing
* Optical metrology
* Instrumentation
* Replacement for Nd:YAG and fiber lasers
Laser Resistor Trimming of Thick- and Thin-Film Hybrid Devices
Active and Passive
Large board thick film resistor trimming is a specialty of Laserod. Board sizes to 24" x 24" or 36" x 24" are easily handled. Upon job completion, Laserod will provide you with Excel® graphs that indicate your initial and final trim values for your comparison.
Large Microwave Circuit Board is Laser Resistor Trimmed.
Laser Trimming Hybrid Microwave Resistors
Fig. 1. 16" x 12" large microwave circuit board is trimmed by YAG laser..
The precision equipment delivers a trim accuracy as high as 0.1%, a measuring accuracy of 100 ppm, and a range between 0.1 ohm to 1 Gigohm.
Passive Trimming
Involves removal of material from a resistor to increase its resistance. The resistance or voltage parameter is monitored across the component contacts.
Active Trimming
Involves removal of material from a resistor to change a circuit parameter. Also called functional trimming, because the circuit is functioning during the trimming process. Parameters monitored are ACV, DCV, ACI, DCI, PERIOD, FREQUENCY.
Laser Trimming Active Circuits
Fig. 2. Setup for active laser trimming of a device under test. Circuit under laser is powered up by cables coming off to the right.
IEEE488 I/F as GPIB to measuring/test equipment.
Laser Parameter Considerations
Spot Size: Our Nd: YAG laser spot size typically ranges from 25 to 75 microns. The spot size should be wide enough to avoid electrical arcing across a narrow trim. Also the spot size should be narrow enough so that the side rays do not "cook" the resistor, producing a heat affected zone and degrading the resistor's long term stability.
Laser Beam Focus: The laser beam focus is not a very critical factor for thick film trimming applications because the optics have very long depths of focus. Typically, the depth of focus can be +/- 250 microns. For thin film it may be a more critical factor. As the beam goes out of focus in the near and far fields, the resistor drift will increase.
Trim Rate: Faster trimming will result in lower accuracies. It may also mean having to use higher repetition rates to achieve satisfactory material removal.
ROUND & ROUT
OVERALL DIA. CUTTER DIA. RADIUS CUTTING EDGE LENGTH OVERALL LENGTH MAX. CUTTER LENGTH SHANK
DIA. PART NUMBER
3/8 3/16 3/32 5/16 2 5/16 1/4 H25XAM-56100
1/2 1/4 1/8 3/8 1-7/8 3/8 H25XAM-56170
3/4 .240 1/4 1/2 2 1/2 H25XAM-49700
.615 3/16 1/2 2-1/8 3/16 H25XAM-49701
7/8 .245 5/16 9/16 2-1/6 7/16 H25XAM-49702
1 .250 3/8 5/8 2-1/8 15/32 H25XAM-49704
1-1/8 1/2 5/16 9/16 2-3/4 9/16 H25XAM-56178
1-3/8 .363 1/2 1 2-1/2 3/4 H25XAM-49706
1-3/4 .500 5/8 1-1/4 2-3/4 1 H25XAM-49708
2 3/4 1-7/16 2-15/16 1-1/8 H25XAM-49710
Italian Washer Example 1 - Candy
This section shows a "Candy" washing machine from a vacation rental in Tuscany. We have another example machine shown after this.
Chris from CA took these photos of a washing machine in Italy, spring 2002. Thanks to people on the message board for providing some of these translations!
The typical Italian washing machine is a front loader and is smaller than an American machine, but a good one holds just as much laundry. Push your laundry into the machine without leaving extra space.
These machines run a long wash cycle - well over an hour to do a load of wash (more like 90 minutes) - but they wash your clothes well and use less water. This style of machine is becoming popular in the US now. (We have one and love it.)
Morphy Richards-Divo Essentials
MRP: Rs 3,095
Prices of products featured on Compare India are subject to change without prior notice.
View Details
Machine Type
Machine Type JMG
Functions
Wet Grinding
Dry Grinding
Chutney Grinding
Whipping
Blending
Mincing
Grating
Juicing
Pureeing
Blades
Number of Blades 2
Dry Grinding Blade
Wet Grinding Blade
Whipping Blade
Chutney Blade
Mincing or Grating Blade
Universal Blade
How it works?
It performs all the functions of the Juicer/Mixer/Grinder without changing any blade
Benefits
This blade performs all the important functions like dry/wet grinding, blending, mixing, etc. In most mixer grinders this blade is not detachable.
---
Jars
Number of Jars 2
Liquidiser or Blender Jar
Grinding Jar
Chutney Jar
Material of Jars Stainless-steel
Inbuilt Juicer Features
Type of Juicer ---
Juicer Accessories ---
Included Accessories
Instruction Cum Recipe Book
Stirrer Cum Scraper ---
Cord Winding ---
Physical Features
Material of Housing ABS
Material of Lid Polycarbonate
Motor
Motor Type Heavy Duty
Rating (Minutes) ---
Motor Speed (rpm) ---
Switch
Type of Switch Rotary
Highest Switch Speed Level 3
Incher or Pulse Facility
Power Requirement
Power Consumption (Watts) 500
Voltage (Volts) 230
Safety Features
Locking System
Overload Protection
HEAT CUTTING MACHINES
MODEL LE-10
MODEL
LE-10
DIAMETER OF UNWINDING CLOTH
1200 MM
MAX. CUTTING WIDTH
1000MM
MAX. CUTTING LENGTH
0-9999MM
CUTTING ACCURACY
+.- 4MM
WORKING CAPACITY
25~35 cut/min(25-35pcs/min)
DRIVING MOTOR
AC 2HPX1, 1/4 X1
POWER REQUIRED
3.5KVA
BAG COUNTER
1set
EASY OPEN MOUTH DEVICE
1set
DELIVERY UNIT
COUNTING STACK TYPE BELT CONVEYOR
AUTO UNWINDER
1set(cylinder 2 pcs)
LOADING CAPACITY
1250kgs
MANPOWER REQUIRED
1person
MACHINERY NET WEIGHT
800kgs
MACHINERY DIMENSION
L438 x W155 x H140cm
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