Short answer
When designing for high-density electronic interconnects, consider picosecond UV laser ablation as a viable method for achieving sub-7 micron microvias, balancing performance with manufacturing cost.
- Field
- Modelling
- Source
- Academic Publication (2019)
- Method
- Experimental investigation and comparative analysis of laser ablation techniques.
- Evidence
- Strong effect
Picosecond UV laser technology, by minimizing heat-affected zones and utilizing high repetition rates, enables the fabrication of microvias with diameters less than 7 microns, pushing the boundaries of miniaturization in electronic packaging. This modelling research insight is drawn from a 2019 study published in Academic Publication. Using Experimental investigation and comparative analysis of laser ablation techniques., researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing for high-density electronic interconnects, consider picosecond UV laser ablation as a viable method for achieving sub-7 micron microvias, balancing performance with manufacturing cost.
Laser Ablation Achieves Sub-7 Micron Microvias for Advanced Electronics
Picosecond UV laser technology, by minimizing heat-affected zones and utilizing high repetition rates, enables the fabrication of microvias with diameters less than 7 microns, pushing the boundaries of miniaturization in electronic packaging.
Academic Publication · 2019
Key Findings
- 01Photolithography can achieve microvias as small as 2 μm, but is limited by the availability and cost of specialized photo-sensitive dielectric materials.
- 02Conventional high-speed UV lasers can produce microvias down to 20 μm.
- 03Excimer lasers enable simultaneous fabrication of 4 μm features in 7 μm thick dielectric, passing 1,000 thermal cycles.
- 04Picosecond UV laser technology, with optimized parameters and materials, successfully fabricated microvias with a minimum diameter of < 7 μm, demonstrating a low-cost alternative with high throughput.
Application
Design takeaway
When designing for high-density electronic interconnects, consider picosecond UV laser ablation as a viable method for achieving sub-7 micron microvias, balancing performance with manufacturing cost.
How to apply
In the design of printed circuit boards, interposers, and package substrates requiring extremely fine interconnects, evaluate the use of picosecond UV laser processing for microvia fabrication.
Project actions
- 01When researching manufacturing techniques for miniaturized electronic components, consider the trade-offs between laser ablation and photolithography.
- 02Investigate the impact of laser parameters like pulse duration and wavelength on material processing and feature resolution.
Method & Evidence
Variables
Strengths & Limitations
Strengths
- +Demonstrates a novel and advanced laser technology for microvia fabrication.
- +Provides comparative data against existing technologies.
- +Includes validation through thermal cycling tests.
Limitations
The study focused on specific dielectric materials; the performance of picosecond UV lasers may vary with different substrate compositions. Long-term reliability testing beyond thermal cycling was not detailed.
Reliability & validity
The study's validity is supported by comparative analysis and thermal cycling tests. Reliability could be further enhanced by testing a wider range of dielectric materials and conducting more extensive long-term reliability assessments.
Think critically
How might the material properties of the dielectric (e.g., filler content, thermal conductivity) influence the effectiveness and resolution achievable with picosecond UV laser ablation compared to photolithography?
Design Principles
"Miniaturization of interconnects through precise laser ablation enhances electronic device density and performance."
This advancement is crucial for the continued development of high-density interconnects in advanced electronic devices, such as 2.5D interposers and fan-out packages. Achieving smaller microvias allows for denser circuitry, leading to more powerful and compact electronic products.
What This Means for Your Design
Using a special kind of laser that fires super-fast pulses (picosecond UV laser) allows us to make tiny holes (microvias) in electronic circuit boards that are smaller than 7 micrometers. This is important for making electronics smaller and more powerful.
How to use in your project
- 1.Reference this study when discussing the feasibility of achieving sub-10 micron features in electronic interconnects, particularly when exploring laser-based manufacturing methods.
Add to My Project
Quick Cite
Paragraph starter
The development of picosecond UV laser technology offers a significant advancement in the fabrication of ultra-small microvias, with demonstrated diameters below 7 microns. This technique minimizes thermal damage to dielectric materials and supports high manufacturing throughput, making it a viable and potentially cost-effective alternative to photolithography for creating the dense interconnects required in next-generation electronic packaging.
Source
Academic Publication
Next Generation of 2-7 Micron Ultra-Small Microvias for 2.5D Panel Redistribution Layer by Using Laser and Photolithography Technologies
journal · 2019
View sourceQuestions About This Research
- What does the research say about laser ablation achieves sub-7 micron microvias for advanced electronics?
- When designing for high-density electronic interconnects, consider picosecond UV laser ablation as a viable method for achieving sub-7 micron microvias, balancing performance with manufacturing cost. Evidence: Academic Publication (2019).
- Why does "Laser Ablation Achieves Sub-7 Micron Microvias for Advanced Electronics" matter for design?
- This advancement is crucial for the continued development of high-density interconnects in advanced electronic devices, such as 2.5D interposers and fan-out packages. Achieving smaller microvias allows for denser circuitry, leading to more powerful and compact electronic products.
- How can designers apply this research?
- When designing for high-density electronic interconnects, consider picosecond UV laser ablation as a viable method for achieving sub-7 micron microvias, balancing performance with manufacturing cost.
- What were the main findings?
- Photolithography can achieve microvias as small as 2 μm, but is limited by the availability and cost of specialized photo-sensitive dielectric materials.. Conventional high-speed UV lasers can produce microvias down to 20 μm.. Excimer lasers enable simultaneous fabrication of 4 μm features in 7 μm thick dielectric, passing 1,000 thermal cycles.. Picosecond UV laser technology, with optimized parameters and materials, successfully fabricated microvias with a minimum diameter of < 7 μm, demonstrating a low-cost alternative with high throughput.
- What research method was used?
- Experimental investigation and comparative analysis of laser ablation techniques..
- How strong is the evidence?
- Evidence strength is rated Strong effect, based on a 2019 journal from Academic Publication.
- What should I do differently in my next project?
- In the design of printed circuit boards, interposers, and package substrates requiring extremely fine interconnects, evaluate the use of picosecond UV laser processing for microvia fabrication.
- What are the limitations?
- The long-term reliability and specific material compatibility beyond the tested dielectric require further investigation. The cost-effectiveness compared to established photolithography for extremely small features needs ongoing evaluation.