ACCESS
 Shrinking component sizes and denser chip scale packaging
technologies are posing new challenges to test engineers.
Test pads, traditionally installed on PCBs, are being
eliminated from many designs thus reducing physical
access. Flying Probers are required to operate with
unprecedented precision in order to meet the new
challenges. FLS900 uses highly repeatable closed loop
linear motor drives and joystick-like variable angle probe
modules to maximize physical access and guarantee
repeatable probing of fine pitch devices and small
components like 0201, 01005s. FLS900 offers double sided
probing and up to 24 probe modules on the
component and solder side of the Unit Under Test (UUT)
to facilitate efficient single pass testing.
ACCURACY
Due to its modular and scalable architecture, the FLS900
guarantees superior probing precision and repeatability.
Precise Closed Loop planar linear motors (shuttles) with “AccuFast™ Drive System” (±0.1 micron positioning
resolution) independently move probe modules and cameras.
The probe modules utilize equal-length identical probes
to contact target points on the UUT. Each probe module is
able to set the probing angle from 0º to 6º from vertical
in any direction. The combination of shuttles’ positioning
and joy-stick like probe motion ensures unmatched
accessibility to points on the UUT. You can now test
boards whose layout, size, and technology defy testing
on traditional in-circuit and other moving probe testers.
FLS900 system architecture ensures repeatability:
- Closed Loop Drives for shuttles and probe modules
ensure precise and repeatable positioning of the
probes.
- Riding on 12 micron air gap, shuttles travel free of
friction and with no mechanical contact on the stator
plane and therefore operate free of wear.
- High resolution fiducial detection cameras,
precise lighting, and advanced image processing
software ensure precise and repeatable detection
of fiducial marks on the UUT as well as correct
compensation for any offsets.
- The electronic measurement system relies on
precision circuits and components for reliable and
repeatable measurements.
- Integrator Pro™ system control software with
sophisticated motion control and measurement
algorithms ensures robust and repeatable
operation. Highest Fault Coverage
The high speed and precision analog measurement unit provides 4-wire measurements capability for all 24 flying probes (top and bottom sides). All probes can perform in-circuit tests as drivers,
sensors, or guards on discrete and integrated analog/digital components.
PROBING ANGLE
 Warping of printed circuit boards is a common issue that
should be taken into account in SMT board assembly,
inspection and test processes. During Flying Probe test,
board warp changes the physical position of target points by an offset. When probing angle is
0 degrees from vertical, board warp will cause no
probing errors, however, as the probing angle increases,
the probing error also increases. A 0201 chip on a board
with 0.5 mm warp using 15 degree probing angle cannot
be probed dependably. Decreasing probing angle to 3 or
4 degrees reduces warp related uncertainty, and leads to
reliable probing.
As probing angle increases the probe slippage factor
increases. Probe slippage can lift pads and vias and leave
unacceptable marks on the target.
SPEED
Test time on Flying Probe depends mainly on the number
of test steps and speed of probe movement. Shorts Test
consume a large part of overall test time. FLS900’s
flexible measurement system provides a host of test
strategies including Boundary Scan (JTAG) and NetScan™ to significantly reduce test time without impacting test
coverage or repeatability. In addition AccuFast™ Drive
system boosts speed and acceleration by 4 times over
open loop systems.
Key Features of AccuFast Drive System™
- Significantly faster than open loop systems (4x)
- High acceleration (4x)
- Enhanced probing accuracy
- Three times better dynamic response
+/- 1 degree rotation
- Automatic orthogonality between X and Y axis
- Sensorless homing (no adjustments)
- DSP based motor controller
- Built-in linear and parabolic interpolation (more
efficient shuttle movements)
- Low energy usage (50% reduction)
Boundary Scan (JTAG) testing can reduce the overall “shorts” and “opens” test time by up-to 80%.
 PATENTED MULTI-PROBE SYSTEM
The FLS900 has a modular architecture that is
expandable to 24 probes. The probe modules have easily
interchangeable probe tips. A range of probe tip styles
are available off the shelf. In addition to providing
excellent test coverage on densely populated circuit boards,
this flexibility makes the FLS900 an ideal solution for
testing backplanes where direct contact with connector
pin tips is required.
FLS900 systems can be configured with Acculogic’s
patented Multi-nail Probe Module (MPM) which provides
the functionality of a small bed-of-nail access in the
flying probe system a “Flying Fixture”. This customizable
Probe Module can be used in functional testing, digital,
boundary scan (JTAG) testing and more. Its low cost
and flexibility makes MPM an indispensible addition to
the system.
MEASUREMENT SYSTEM
High speed (up-to 1000 measurements/sec) and precision
analog measurement system provides 4-wire measurements
capability for all 24 flying probes (top and bottom side).
All probes can perform in-circuit tests as drivers,
sensors, or guards on discrete and integrated analog/digital components. Analog testing of resistors, capacitors,
inductors, diodes, Zeners, transistors, FETS, thyristors,
opto-couplers, switches, trimmers, relays, fuses and
connectors is available on the FLS900. These include
2-wire and 4-wire tests, device ON and OFF tests using
two sets of separately available stimulus/measurement
resources. Also, power-on testing for voltage regulators
and operational amplifiers are possible using the voltage
measurement module.
SOFTWARE
Integrator Pro Features:
- Automatic program generation software
- Built-in Boundary Scan (JTAG)
- Automatic multi-level guard assignment
- Auto-debug (unattended)
- Test Sequence with logical flow control
- Interactive board description editor add/modify
test points, package etc.
- Panelization support
- Program and motion optimization
- Powerful Script language for functional and
advance testing
- Test coverage report generation
- Statistical Process Control (SPC)
- RepairMatic™ graphical repair station software
Test program generation for FLS900 testers is highly
automated, simple, and intuitive. The process starts by
using the XMATIC™ software to translate UUT data
from any of the 35-plus commonly used CAD formats.
CAD data is merged with the Bill ofMaterials, and other
relevant information to create an output file that contains
data elements required to automatically generate test
programs.
Integrator Pro is the automatic test program generator
(ATPG) and operating software that manages all aspects
of test program sequencing, debugging, optimizing, and
execution on the Flying Scorpion. The Integrator Pro
also manages all physical resources of the tester including
motion, vision, electrical stimulus and measurement.
Integrator Pro supports many different plug-in modules
such as Boundary Scan, BodeScan and FlashScan etc. which
enhance test coverage and increase execution speed. An
easy-to-use scripting language opens up internal resources
of the tester, providing users with maximum flexibility to write complex test protocols with simultaneous use of
multiple probe modules.
The Integrator Pro is also equipped with an impressive
set of tools for statistical process control, test execution
flow management, and test coverage report generation.
Interfaces to automatic repair processes, and automatic
test program management (version control) are available.
BodeScan™
BodeScan™ is a unique built in network analyzer that
extends the system fault coverage to small value
resistors, capacitors, and inductors in complex networks
found on RF boards.
VECTORLESS TEST
PinScan™ Patented Open Pin Detection suite
PinScan is a complimentary suite of analog and digital
test techniques for detecting Opens on ICs, including BGAs, as well as connectors and polarized capacitors.
- CScan™ is a patented technique used in vectorless
testing of ICs and connector pins. CScan is used to
test open pins as well as the polarity of electrolytic
capacitors. CScan functionality detects open pins on
devices located on the top and/or bottom side of the
board.
- ChipScan™ is a patented 3-pin technique for vectorless
open testing on digital IC pins. It exploits the
parasitic diodes/transistors in each digital IC, and
tests each pin for open faults. Power up is not
required in order to use ChipScan. This method is
particularly useful where bus structures are used.
ChipScan detects wire bonding defects, open pins
and cold joints. ChipScan functionality is available
on all probes covering top and bottom side of the
unit under test.
- ScanProbe™ is a digital technique that uses flying
probes to detect opens on digital IC pins of devices
that are IEEE-1149.1(JTAG) compliant. ScanProbing
is fast and repeatable, uses the digital and boundary
scan capability of the FLS900 for fault detection.
BOUNDARY SCAN
Features:
- Fully integrated hardware and software
- IEEE1149.1 and IEEE 1149.6 supported
- Support for multiple scan chains up-to 8
- Scan and non-scan testing
- Automatic test optimization
- Automated test generation and intelligent diagnostics
Boundary scan (JTAG) is a test methodology based on
IEEE 1149.1 standard. Compliant Semiconductors,
when installed on a circuit board, allow the interconnecting
nets and digital clusters such as memory
devices to be tested on the FLS900. Furthermore, Boundary
Scan offers a comprehensive board-level protocol for
programming flash and other programmable devices.
Integration of boundary scan with flying probe systems
is no longer an option but a requirement since the
combined strategy improves test coverage and test time.
Boundary scan is an integral part of the FLS900; digital
test patterns generated by Acculogic’s powerful
ScanNavigator software are delivered to the UUT
through Probe Modules or board carrier system.
FLS900 goes beyond interconnect testing by providing full digital test capability when and where needed. This
technological break-through is made possible by merging
Acculogic’s two powerful software suites, the “Integrator
Pro” and the “ScanNavigator”.
“Boundary Scan, not an afterthought
but an Integral part of the System”
FLS900’s advanced boundary scan extends the testing to
assemblies that contain a mix of Scan and non-Scan logic
by providing Shorts Test between boundary scan nets
and non-boundary scan nets where the non-scan nets
have flying probe access.
Benefits
- Dramatic increase in test coverage by combined
use of flying probe and boundary scan resources
- More efficient shorts test using flying probes and
higher throughput
- Reusable Boundary Scan test patterns
VISION TEST
OptiScan™ a multi-camera dual sided vision system with
precise lighting, and advanced image processing software
provides vision inspection for presence, absence and
orientation of components such as decoupling capacitors,
polarity of electrolytic capacitors and presence of
mechanical parts.
OptiScan Features:
- Up-to 8 (4 top/4 bottom) high resolution CCD
cameras
- Flexible target illumination
- 1D and 2 D bar code reader
- Optical Character Recognition (OCR)
Advance Function Testing
FLS900 system’s open architecture supports integration
of general purpose instrumentation through the FSM
Switch Matrix Card. Acculogic provides device drivers
for an extensive list of instruments.
DEVICE PROGRAMMING
FlashScan™ – In-Circuit Device Programming
Programmable devices such as PLDs, Flash, PROMs are
frequently used on most modern circuit board assemblies.
In-production-programming (configuration) of these devices
provides the flexibility for on-the-fly content changes as
opposed to using pre-programmed parts. Device
Programming on the FLS900 improves production efficiency
by removing an extra step in the production process.
FlashScan™ is a multi-vendor integrated hardware and
software suite that provides the FLS900 with capability
to program and verify a wide range of devices.
SPC SOFTWARE
Statistical Process Control Software
Integrator Pro’s SPC software is a powerful statistical
process control (SPC) tool that analyzes and identifies
variations in test results due to variations in process
environment. Using a series of measurements made
repeatedly on a single board or on batches of production
boards, developers are able to identify measurements
that are least stable. They can then examine these
measurements for root causes of instability and alleviate
the causes. SPC software allows developers to analyze
test variance due to noise, component variation, drift, and
system variance. Test limits can be updated automatically
under user control to obtain solid production-ready tests. |
