Coruna Screen Printer for High-Precision Flexible Electronics & Multi-Layer Alignment

Overview

The Coruna Screen Printer for High-Precision Flexible Electronics & Multi-Layer Alignment is an industrial-grade screen printing platform engineered for sub-50 µm registration accuracy and repeatable deposition control in advanced microelectronics manufacturing. Based on the proven mechanical architecture and process heritage of ATMA/INNOVATION — a Taiwan-based pioneer in precision screen printing since 1986 — this system integrates pneumatic-driven squeegee actuation, rigid cast-iron frame construction, and modular motion control to support both rigid and flexible substrates under cleanroom-compatible operating conditions. Its core measurement principle relies on real-time optical alignment via dual-axis CCD vision systems with sub-pixel edge detection algorithms, enabling closed-loop positional correction prior to print stroke initiation. Designed specifically for semiconductor assembly and packaging workflows, the platform addresses critical challenges in printed electronics: layer-to-layer overlay tolerance (< ±15 µm), ink thickness uniformity (CV < 3.5% across 300 × 300 mm area), and substrate warpage compensation for thin-film polyimide (PI) or PET carriers.

Key Features

• CCD-based fully automatic optical alignment system with dual-camera configuration (top-view + side-view) for fiducial recognition and real-time offset compensation
• Pneumatically actuated squeegee module with independent pressure and speed control (0.1–10 mm/s range, ±0.02 mm positioning repeatability)
• Modular XYθ stage with linear motor drive and granite base for thermal stability and vibration damping
• Substrate handling options: vacuum chuck for rigid glass/PCB (up to 600 × 600 mm), pin-and-clamp fixture for FPCs with carrier frames (thickness range: 0.05–0.3 mm)
• Integrated environmental monitoring: temperature (±0.5°C) and humidity (±3% RH) sensors with data logging capability
• Compliance-ready architecture supporting audit trails, user access levels, and electronic signature protocols per FDA 21 CFR Part 11 requirements

Sample Compatibility & Compliance

The Coruna Screen Printer accommodates a broad spectrum of substrates used in semiconductor packaging and optoelectronic fabrication, including but not limited to: rigid FR-4 and ceramic PCBs; flexible polyimide (PI) and polyester (PET) films with copper or silver nanoparticle traces; ITO-coated glass and PET for touch sensor electrodes; patterned OLED encapsulation layers; and biofunctionalized microfluidic test slides. All motion components meet ISO 9001:2015 certified production standards. The system supports traceability documentation aligned with IPC-7351B footprint specifications and JEDEC J-STD-020 moisture sensitivity level (MSL) handling guidelines. Optional upgrade kits enable compatibility with Class 1000 cleanroom environments (ISO 6).

Software & Data Management

Equipped with Coruna’s proprietary ScreenControl™ v4.2 software suite, the printer delivers deterministic recipe management, multi-layer alignment mapping, and statistical process control (SPC) charting. Each print cycle generates timestamped metadata including fiducial deviation logs, squeegee force profiles, ambient condition snapshots, and operator ID. Data export conforms to ASTM E2500-17 for equipment qualification records and supports CSV, XML, and SQLite formats for integration into MES platforms such as Siemens Opcenter or Rockwell FactoryTalk. Audit trail functionality includes immutable event logging with SHA-256 hashing, retention configurable up to 36 months, and role-based permissions (Admin, Technician, QA Auditor).

Applications

• Multi-layer alignment printing for flex-rigid hybrid PCBs requiring ≤25 µm layer-to-layer registration
• Conductive ink patterning on curved or ultra-thin substrates (e.g., foldable display interconnects)
• Dielectric barrier deposition for MEMS sensor passivation layers
• Functional ink printing for printed battery current collectors and RFID antenna structures
• UV-curable solder mask application on high-density HDI substrates
• Biocompatible conductive trace printing on diagnostic microarrays and lab-on-chip devices

FAQ

What substrate thickness ranges are supported for flexible electronics printing?
Standard configuration supports 0.05–0.3 mm thick flexible substrates mounted on carrier frames; optional thin-film vacuum chucks extend compatibility down to 25 µm free-standing PI films.
Is the CCD alignment system compatible with non-metallic fiducials (e.g., printed polymer markers)?
Yes — the dual-wavelength (525 nm / 850 nm) illumination module enables contrast optimization for both reflective metallic and absorptive organic fiducials, with adjustable thresholding and morphological filtering.
Does the system provide GMP-compliant documentation for pharmaceutical or medical device manufacturing?
When configured with IQ/OQ documentation packages and 21 CFR Part 11 add-ons, it meets GLP/GMP requirements for regulated printed electronics applications such as biosensor manufacturing.
Can the printer be integrated into an automated material handling line?
Yes — standard SECS/GEM interface and EtherCAT motion bus support seamless integration with SMEMA-compliant conveyors and robotic load/unload stations.
What is the typical maintenance interval for the pneumatic squeegee system?
Preventive maintenance is scheduled every 1,000 operational hours or 12 months, whichever occurs first; consumables include squeegee blades (polyurethane or diamond-coated), vacuum filters, and pneumatic seals.