HSHI-Tech is one of several companies offering glass
quartz, and sapphire machining and bonding
technologies. We satisfy the high-end, high-quality
optical measurement requirements of our customers in
the biomedical and chemical industries. Our company has
grown to be a leading manufacturer of superior-quality
cost-effective precision optical components.
Generally, the manufacturing of optical components
involves micro-machining, optical polishing, and
diffusion bonding in a high-temperature furnace, with cl
eaning processes performed between each step.
Our core technology is to polish the surface of optical
materials to a flatness within 100 nm, and then bond
these materials by atomic diffusion. Without the use of
adhesive bonding, our optical products are strongly
resistant to heat and chemicals, while also having
superior optical surface quality.
The micro-machining process is a technology in which
HSHI-Tech has particular expertise. A microchannel with
width and depth of a few hundred micrometers is
achieved using a mechanical micro-milling tool.
Furthermore, a micro-hole with a diameter of a few
hundred micrometers is manufactured using a specific
mechanical micro-drilling technique. Micro-holes
smaller than 50 mm can be machined using a laser-drilling
technique and a nanosecond laser source, as shown in
Fig. 1(a). HSHI-Tech developed a laser-drilling technique
for drilling holes with an aspect ratio as high as 20:1, as
shown in Fig. 1(b).
When quartz and sapphire are being machined, chips and
particles are generated in massive quantities.
The machining process is similar to that of mechanical
wear, whereby micro-diamond particles coating the
surface of the drilling and milling bits forcibly hit the
surface of work pieces. Thus, maintaining high cleanness
is crucial to avoid contamination by particles adhered to
material surfaces, which would degrade the optical
quality of our products. After long-term experimentation
we established a differentiated cleaning process using
alkali chemicals such as SC1 and KOH that effectively
remove contaminated particles that may be adhered to
micro-channels and micro-holes.
In our factory, we employ a seamless system for producing
optical and bio parts, as illustrated in Fig. 2. The
production line consists of quartz and ceramics
machining equipment, a laser drilling and milling machine
an optical polisher with a precise polishing pad, and
a high-temperature furnace. The surface flatness and
roughness of polished quartz and sapphire are measured
with a laser interferometer, as shown in Fig. 3.