Behind the Mass Production of Hybrid Bonding: How Precision Motion Stages Meet the High-Precision Control Demands of Semiconductor Packaging

Figure 1: Chip-package co-design workflow

If heterogeneous integration can be likened to constructing a fully functional skyscraper, then hybrid bonding is the most advanced and robust steel-rebar connection technology within it. Among the many advanced packaging processes, hybrid bonding demonstrates significant advantages due to its ability to deliver extreme interconnect density, higher transmission bandwidth, superior energy efficiency, and a more compact system footprint.

Figure 2: AMD-related products

In July this year, Samsung announced that it would begin applying hybrid bonding technology starting with the 16-layer stack of HBM4E (seventh-generation high-bandwidth memory); SK Hynix plans to introduce hybrid bonding technology starting with the 20-layer stacked HBM4E; and Micron announced in June that it had begun shipping its next-generation HBM4 memory samples to key customers.

As heterogeneous integration technology advances toward higher density and integration of more components, advanced processes such as hybrid bonding are subject to increasingly stringent accuracy requirements. In hybrid interconnect processes with chip-to-wafer bonding pitches of less than 3 μm, the bonding alignment accuracy (3σ) is typically required to be controlled within 10% of the bonding pitch (i.e., when the pitch is <3 μm, the 3σ accuracy must be <0.3 μm).

At the same time, as more components and interconnects are incorporated into a single package, the number of potential failure points increases. A defect in any single chip or interconnect can jeopardize the entire multi-chip package, resulting in costly yield losses. In this environment, tighter process control becomes indispensable for ensuring high yield and high reliability.

Against the backdrop of continuously shrinking bump pitches, increasing integration density, and growing heterogeneity in integration schemes, precision motion stages must achieve further breakthroughs in nanometer-scale positioning accuracy and multi-axis synchronous control to support the demanding requirements of next-generation advanced packaging processes.

Figure 3: 10 μm-pitch hybrid bonding (left) and 1.9 μm-pitch hybrid bonding (right) by NHanced Semiconductors, Inc.

03 Geocentric Solutions

With an application-driven approach, Geocentric Technology has been deeply engaged in the high-precision motion stage field for many years, accumulating extensive customisation experience in real-world semiconductor industry applications. Addressing the stringent requirements that hybrid bonding imposes on motion stages, Geocentric Technology offers a range of high-precision motion stages precisely tailored to customer W2W/D2W application scenarios:

ONEXY Series XY Linear Motor Mechanical Stage

• Enables high-precision, high-speed positioning of chips/wafers in the horizontal plane, reducing bonding misalignment caused by positioning errors.

• Electronic resolution: 1 nm; minimum step: <20 nm.

• Wide range of travel options, combining large stroke, high precision, heavy load capacity, and low lateral height.

• Open-frame structure facilitates integration into various multi-axis configurations.

Surface Series Planar Air Bearing Stage

• Delivers high-precision, high-speed positioning of chips/wafers while meeting the high cleanliness requirements of hybrid bonding.

• High dynamic performance (cut-off frequency >330 Hz).

• H-type structure with air guideways on both dual-drive axes and the beam axis.

• Equipped with high-precision zero-coefficient-of-thermal-expansion grating feedback, featuring low expansion coefficient and minimal thermal drift susceptibility.

SurfaceZ Series Direct-Drive Z-Lift Stage

• Precisely controls the upper-and-lower bonding process, ensuring smooth vertical motion to prevent chip/wafer damage.

• High dynamic performance (no-load cut-off frequency >120 Hz).

• Low lateral height, suitable for space-constrained applications.

• In-position stability: 5 nm (configured with linear driver, in vibration-isolated laboratory environment).

SMH-165V Series Direct-Drive Z-Lift Stage

• Precisely controls the upper-and-lower bonding process, ensuring smooth vertical motion to prevent chip/wafer damage.

• Flexible configuration with optional travel ranges and power-off self-locking functionality.

• Minimum step: 20 nm; repeatability: ±200 nm; positioning accuracy: ±500 nm.

• In-position stability: 20 nm (configured with linear driver, in vibration-isolated laboratory environment).

ZTT-V2 Series 3-Axis Tip-Tilt-Z Stage

• Real-time adjustment of chip/wafer height and posture to ensure uniform contact across the entire bonding interface, preventing local non-bonding or stress concentration.

• Integrated Z-lift and tip-tilt levelling platform.

• Spherical hinge structure enabling multi-axis coordinated control.

• Z-axis micro-step: 20 nm; Tip-tilt micro-step: 0.05 arc sec.

Beyond standard products, Geocentric Technology offers in-depth customisation across critical dimensions such as accuracy, number of axes, and travel based on specific customer requirements, delivering tailored motion platform solutions to facilitate efficient project implementation.

From the grand architecture of heterogeneous integration to the minute interconnections of hybrid bonding, every major leap in advanced packaging technology relies on solid support from underlying motion control precision. Building upon this foundation, Geocentric Technology will continue to provide state-of-the-art high-precision motion stages, empowering customers to achieve generational leaps in integration density, system performance, and production yield, and to secure a competitive edge in the next phase of the semiconductor industry.