Tolerance Considerations for MHMIC Manufacturing Process at Millimeter-Wave Band

Area of Science:

• Electrical Engineering
• Microwave Engineering
• Materials Science

Background:

• Monolithic Hybrid Microwave Integrated Circuits (MHMIC) are crucial for 60 GHz millimeter-wave applications.
• Manufacturing process uncertainties can significantly impact MHMIC performance.
• Understanding fabrication tolerances is key to achieving reliable circuit performance.

Purpose of the Study:

• To investigate manufacturing uncertainties in MHMIC fabrication at 60 GHz.
• To assess the impact of tolerances in thin-film components and bonding on circuit performance.
• To establish relationships between manufacturing variations and circuit parameters for improved fabrication.

Main Methods:

• Experimental quantification of manufacturing tolerances for key MHMIC components.
• Analysis of implementation tolerances for gold microstrip transmission lines, titanium oxide resistors, radial stubs, and gold-bonding ribbons.
• Prototyping and performance evaluation of MHMIC circuits to assess tolerance impacts.

Main Results:

• Identified acceptable dimensional variations for critical MHMIC components to maintain reasonable performance.
• Quantified the impact of manufacturing tolerances on MHMIC circuit parameters.
• Demonstrated a correlation between fabrication variations and circuit performance metrics.

Conclusions:

• Manufacturing tolerances for thin-film components and bonding significantly affect 60 GHz MHMIC performance.
• Establishing relationships between tolerances and circuit parameters allows for enhanced accuracy and flexibility in MHMIC fabrication.
• This study provides a framework for optimizing MHMIC manufacturing processes by managing dimensional variations.