TECHNICAL SPECIFICATIONS

The Hewlett-Packard Model 4145B Semiconductor Parameter Analyzer is a fully automatic, high performance, programable test instrument designed to measure, analyze, and graphically display the DC characteristics of a wide range of semiconductor devices, such as diodes, bipolar transistors, field-effect transistors, wafers, ICs, etc. Main applications include computer-aided design (CAD) of ICs, new device evaluation, materials evaluation, component selection for circuit design, incoming/outgoing inspection, semiconductor process control, quality control, and quality assurance. It is equipped with four programmable Source/Monitor units (SMU), two programmable voltage source units (Vs), two voltage monitor units (Vm), a fully interactive graphics display and softkeys.

For device stimulation an characteristics measurement, the 4145B has eight channels. Channels 1 through 4 are Source/Monitor units (SMU); channels 5 and 6 are voltage source units (Vs); and channels 7 and 8 are voltage monitor units (Vm).

Each SMU channel has three modes of operation: Voltage source/current monitor (V), current source/voltage monitor (I), and common (COM). Source voltage and source current can be held constant or swept linearly or logarithmically. When used as a voltage source/current monitor (V mode), each SMU can be programmed to output DC voltages from 0V to ±100V over three ranges-0V to ±19.0000 V, ±20V to ±39,998V, and ±40V to ±100V- with a resolution of 1mV, 2mV, and 5mV, respectively. When used as a current source/voltage monitor (I mode), each SMU can be programmed to output currents from ±1pA to ±100mA over nine ranges, with a resolution of 1pA max. (current measurement resolution is 50fA max.), depending on the current range. Current through the sample in V mode and voltage ocross the sample in I mode can be limited to prevent damage to the sample.

The two Vs channels are programmable voltage sources. Output voltage can be held constant or linearly or logarithmically swept from oV to ±20V with 1mV resolution. The voltage sources are used when many bias and voltage sources are required.

Of the six source channels (four SMUs, two Vs), any combination of three can be automatically swept in a linear or logarithmic staicase manner within the range of each channel. Hold times from 0 to 650 seconds and delay times form 0 to 6.5 seconds can be programmed. In a multi-channel sweep setup, one channeld functions as the main sweep channel. One of the other channel, while one other channel can be swpt subordinately to dhe main channel. SMUs not swept can be userd as constant current or constant voltage sources.

The two Vm channels are used to measure voltages up to ±20V.

Measurement results, measurement setups, opertor prompts, error messages, and diagnostrics are displayed on a fully interactive, microprocessor based graphics display. Measurement results can be displayed in one of two modes: graphic an list.

Front Panel softkeys provide a wide range of automatic display control functions, such as AUTO SCALE, CURSOR, MARKER and ZOOM. Softkeys are used in all phases of instrument operation—from measurement setup to measurement analysis—and make overall instrument operation quick an easy.

Pressing MENU, PREV and NEXt keys control movement through the individual display pages. Instructions, softkey labels, and error messages and codes are displayed on each page.

Furnished with the 4145B is the 16058A, a specially designed shielded test fixture wich connects to the 41145B’s rear panel. Eight different interchangeable DUT boards are provided, allowing measurement of diodes; 3-terminal and 4-terminal transistors; 8-pin, 10-pin, and 12-pin devices; and 18-pin and 28-pin DIP Ics.

SPECIFICATION:

GENERAL INFORMATION

Basic Functions: Measures the DC current through voltage-biased devices and the DC voltage across current-biased devices; Arithmetic calcultation; Displays measurement results and calculation results on a display, graphics analysis capabilities, storage and recall of measurement setups and measurement data.

Source and Measurement Units:

Source/Monitor Units (SMUs): Four SMU channels. Each SMU can be programmed to function as a variable or constant DC voltage source/current monitor or as a variable or constant DC current source/voltage monitor.
Voltage Sources (Vs): Two Vs channels. Each Vs can be programmed to function as a variable or constant DC voltage source.
Voltage Monitors (Vm): TwoVm channels. Each Vm can measure DC voltages up to 20V.

Voltage Sources (Vs): Two Vs channels. Each Vs can be programmed to function as a variable or constant DC voltage source.

Voltage Monitors (Vm): Two Vm channels.

SOURCE/MONITOR FUNCTIONS

Source/Monitor Units (SMUs): Four SMU channels. Each SMU measures current when operating as a voltage source or measures voltage when operating as a current source.

Voltage Sources (Vs): Two Vs channels. Each Vs can be programmed to function as a variable or constant DC voltage source.

Voltage Monitors (Vm): Two Vm channels.

SPECIFICATION COMMON TO ALL CHANNELS
Maximum Withstand Voltage: 100 V (SMU, guard terminal, Vs and Vm).

Maximum Voltage Between Common and GND: Less than ±42 V.

Source Modes (SMUs Only):

V (voltage source/current monitor).
I (current source/voltage monitor), and COM ^*.

* : In COM mode, output voltage is 0 V and compliance is 105 mA.
Source Functions (SMUs Only): VAR1, staircase sweep.

VAR1’, synchronous (VAR1) staircase sweep.
VAR2, subordinate (VAR1) staircase sweep.
CONST, constant source (voltage or current).
Voltage/Current Sweep: Output from each SMU (voltage or current) and each Vs (voltage) can be swept by assigning source function VAR1, VAR1’ or VAR2.
Max. Number of Steps: 512 in single-sweep measurements, up to 575 in multi-sweep measurements.

VAR1: Main sweep. Linear or logarithmic sweep is selectable.

Linear Sweep: Staircase sweep in accordance with the user specified START, STOP and STEP values. Log Sweep: Staircase sweep in accordance with the user specified START and STOP values and selected LOG step (10, 25 or 50 points per decade).

VAR2: Subordinate linear staircase sweep in accordance with the user specified START, STEP and NO. OF STEPS values. VAR2 source channel output is incremented one STEP each time the VAR1 source channel completes one sweep.

VAR1’: Staircase sweep synchronized with the VAR1 sweep. Sweep is made with a user specified, fixed ratio or offset value. VAR1’ output is calculated as:
VAR1’ = a x VAR1 (fixed ratio)
VAR1’ = b + VAR1 (fixed offset)
Where "a" is the user-specified ratio (from ±0.01 to ±10) and "b" is the user-specified offset value. Ratio and offset must be such that the VAR1’ source channel does not exceed its maximum output limit.

HOLD TIME: 0 to 650 seconds, 10ms resolution (max.).
DELAY TIME: 0 to 6.5 seconds, 1ms resolution.
Output Sequence: The order in which the source channels begin output is fully programmable.
Measurement Modes: SINGLE, REPEATED and APPEND.
Integration Time (at each measurement point): SHORT, 3.6ms; MED, 20ms at 50 Hz line frequency, 16.7ms at 60Hz line frequency; LONG, 16 times MED.

DISPLAY FUNCTIONS

Display Modes: GRAPHICS and LIST.

GRAPHIC Display: Two-axes (X-Y) or three-axes (Y-Y1 –Y2) plot of measured parameters and USER FUNCTION calculations.
LIST Display: Used in conjunction with VAR1 Sweep. Up to six measurementparameters and USER FUNCTION results can be displayed for each step of the VAR1 source channel.

ANALYSIS FUNCTIONS

MARKER: On a GRAPHICS plot, the MARKER can be moved along a plotted curve or line. The X, Y1 and Y2 coordeinates at the MARKER location are displayed.

CURSOR: On a GRAPHICS plot, the cursor is two intersecting and perpendicular lines which can be positioned at any point on the graph.
On a LIST displays the CURSOR is moveable pointer (|) using cursor’s keys.
AUTO SCALE: GRAPHIC plots can be automatically rescaled after measurement, providing optimum display of measurement results.

ZOOM: GRAPHIC can be expanded or contracted pressing left or right mouse button one time.