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LDI (Laser Direct Imaging) Fiber refers to the specialized optical fibers and multi-line laser illuminators used to transfer digital circuit patterns directly onto photosensitive substrates (such as PCBs). It replaces traditional physical photomasks and films, offering extremely high resolution (down to the micrometer level). 
Key Applications of LDI Fiber Technology 
1. Printed Circuit Board (PCB) Manufacturing 
In modern electronics, LDI fiber-optic delivery systems channel ultra-precise, computer-controlled UV lasers (typically around 355 nm to 405 nm) directly onto photoresist layers. 
  • Benefits: Speeds up the manufacturing process, eliminates mask-related defects, and is essential for producing high-density interconnect (HDI) boards.
  • Leading Equipment Suppliers: Companies like Orbotech, ORC Manufacturing, and Screen utilize customized optical fibers for exposure tools. 
2. Advanced Fluorescence Microscopy & Bio-Imaging 
In scientific research, LDI refers to "Laser Diode Illuminators" (notably the 89 North LDI series). These systems transmit multi-line, solid-state laser illumination via multi-mode optical fibers to power advanced imaging techniques. 
  • Benefits: Offers unparalleled stability and intensity compared to standard LEDs.
  • Techniques: Widely used in Spinning Disk Confocal Microscopy, Structured Illumination Microscopy (SIM), and FRAP. 
For a visual breakdown of exactly how LDI technology operates in digital pattern transfer and circuit board creation:
Related video thumbnail
01:51
Laser Direct Imaging
Li Cathy
YouTube• Jan 13, 2026
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Laser Direct Imaging and its Advantages


Sierra Circuits
https://www.protoexpress.com › blog › laser-direct-imagi...
Sierra Circuits
https://www.protoexpress.com › blog › laser-direct-imagi...
LDI is a printed board patterning process that uses a laser to directly transfer digital circuit images onto a photoresist-coated substrate using a laser, ...Read more
Missing: Fiber ‎| Show results with: Fiber
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Web results

What is laser direct imaging LDI


Nanjing Hecho Technology CO.,Ltd
https://www.gohecho.com › blog › what-is-laser-direct-...
Nanjing Hecho Technology CO.,Ltd
https://www.gohecho.com › blog › what-is-laser-direct-...
Mar 18, 2022 — LDI, the full name is Laser Direct Imaging, is an exposure process used in the PCB process, and the image is directly imaged on the PCB by the ...Read more

89 North LDI Family Onesheet


Chroma Technology Corp
https://www.chroma.com › chroma-ldi-japan
Chroma Technology Corp
https://www.chroma.com › chroma-ldi-japan
PDF
The LDI is a multiline, solid-state laser illuminator offering up to 1000mW of output ... Recommended output fiber is 400 μm, 0.39 NA bifurcated fiber.Read more
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LDI Family of Products - 89 North


89north.com
https://www.89north.com › 89-north-ldi-family
89north.com
https://www.89north.com › 89-north-ldi-family
The LDI is a multiline, solid-state laser illuminator offering up to 1000mW of output power via a multimode fiber at the price of a low power LED light engine.Read more

Laser Direct Imaging (LDI) - Han


Han's TCS
https://www.hanstcs-laser.com › laser-direct-imagingldi
Han's TCS
https://www.hanstcs-laser.com › laser-direct-imagingldi
Maskless lithography can be realized by LDI. It has many advantages in imaging resolution, alignment accuracy, product yield, automation and so on.Read more

LDI for Flexible Circuit Etch Resist


All Flex Solutions
https://www.allflexinc.com › blog › laser-direct-imagin...
All Flex Solutions
https://www.allflexinc.com › blog › laser-direct-imagin...
Feb 28, 2020 — LDI is actually superior for high density flexible circuit fabrication. The LDI imaging process is capable of reproducing features sizes down to 1 mil.Read more
Missing: Fiber ‎| Show results with: Fiber

LDI 2025: Jagotec Shows Off Its Laser-Illuminated Fiber ...


rAVe [PUBS]
https://ravepubs.com › ldi-2025-jagotec-shows-off-its-l...
rAVe [PUBS]
https://ravepubs.com › ldi-2025-jagotec-shows-off-its-l...
We do laser illuminated fiber optic cable and as you can see this fiber comes in all different types 6 millime 8 mm multistrand.

89North-LDI Laser


Hunt Optics & Imaging
https://hoi-inc.com › product-category › 89north-ldi-laser
Hunt Optics & Imaging
https://hoi-inc.com › product-category › 89north-ldi-laser
The LDI is a multiline, solid-state laser illuminator offering up to 1000mW of output power via a multimode fiber at the price of a low power LED light engine.Read more

LDI-6/7 - Operating Manual


Cairn Research Ltd
https://cairn-research.co.uk › wp-content › uploads
Cairn Research Ltd
https://cairn-research.co.uk › wp-content › uploads
PDF
Laser emission is delivered from the LDI through optical fibers which are connected to SMA optical connectors on the top of the LDI in the fiber access area.Read more
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Bifurcated Fiber for LDI - 89 North


89north.com
https://www.89north.com › ... › By Brand › 89 North
89north.com
https://www.89north.com › ... › By Brand › 89 North
High-performance microscope illumination and an affordable price. 89 NORTH PRODUCT LINE. Web Store By Brand 89 North. Bifurcated Fiber for LDI. 89 North ...Read more
$770.00 · In stock
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