Magnetics Business & Technology - January/February 2023 - 34

VISIONS
Hprobe Advances Production Testing for Magnetic Semiconductor Devices
Robotized 3D magnetic field geneator from Hprobe
Hprobe, a provider of automatic test equipment for magnetic
semiconductor devices, has announced what it says is a breakthrough
magnetic test head revolutionizing magnetoresistive
random access memory (MRAM) wafer sort in mass production.
The new module, the H3DM-XL, is at the heart of the
latest addition to the company's IBEX line, the IBEX-WS.
The system integrates 3D magnetic field capabilities, while
increasing field area and uniformity for wafer probing large
MRAM arrays. The test equipment platform integrating the
new head is the only available commercial product designed
to address the magnetic specificities of MRAM compared to
traditional back-end testing in high volume manufacturing, says
Hprobe.
Siamak Salimy, CTO
and co-founder of
Hprobe
" We introduced this new test head as a
result of close collaboration with MRAM
technology and device engineers. We aim
to enable our customers to implement
new and specific test protocols dedicated
to MRAM wafer sort and to successfully
tackle ramp-up in high-volume manufacturing.
The new-generation test head is
designed to operate with the same test
cell used for traditional logic probing and
is key for STT-MRAM product yield management, "
said Siamak Salimy, CTO and
co-founder.
The test head enables the probing of
large MRAM arrays under a magnetic field
to accelerate per-bit retention testing and non-persistent bit
failures in a production environment. Featuring a high magnetic
field and uniformity over a large surface, the system operates
on single or multiple sites. It can also be used in product development,
validation, and qualification phases. It is specially
designed for testing MRAM arrays with bit cells based on Spin
34 Magnetics Business & Technology * January/February 2022
Transfer Torque (STT-MRAM) and Spin Orbit Torque (SOTMRAM)
magnetic tunnel junctions.
Earlier, Hprobe introduced what it said was the first turnkey
testing equipment dedicated to 3D magnetic sensors used in
both automotive and industrial applications, a system based
on its 3D magnetic field generator technology. Integrated into
test equipment, the generator can establish a 3D magnetic
field in which each spatial axis is driven independently and has
multiple configurations to maximize the field strength or surface
coverage in specific 1D, 2D or 3D orientations.
Hprobe's IBEX 300 testing system
" Our new equipment addresses the crucial step of chip sorting
for the new generation of magnetic sensors tested at waferlevel,
under high field intensity, and on a large area coverage, "
explained Salimy. To validate products for end applications,
it is required to test the magnetic sensors under a magnetic
field. Founded in March 2017 and based in Grenoble, France,
Hprobe is a spin-off company of Spintec, a leading spintronics
research laboratory located in Grenoble.
www.MagneticsMag.com
http://www.MagneticsMag.com
Magnetics Business & Technology - January/February 2023

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