K&S ICONN wire bonder

The ICONN series from K&S (Kulicke & Soffa) is a mature, market-proven fully automatic wire bonder that once served as a benchmark product in the semiconductor packaging industry—particularly within the memory, storage, and LED sectors. Although its core platform has since been succeeded by newer models, its massive installed base and outstanding technical specifications ensure it continues to play a pivotal role on production lines worldwide.

Core Operating Principle

The ICONN wire bonder primarily utilizes thermosonic ball bonding technology. During the bonding process, a gold or copper wire passes through a ceramic capillary; an Electronic Flame-Off (EFO) discharge melts the wire tip to form a ball. Applying pressure and ultrasonic energy, the capillary bonds this ball onto the chip's bond pad through the combined action of heat and ultrasonics, creating a robust electrical and mechanical connection (the first bond). Subsequently, the capillary lifts and moves, forming a specific wire loop shape through precise control, before bonding the tail end of the wire to the substrate or lead frame (the second bond) to complete the connection process. Key Specifications at a Glance

The following is a summary of key specifications for the ICONN series models, facilitating a comparison of their capabilities:

Feature IConn (Base Model) IConn PLUS IConn ProCu PLUS IConn MEM PLUS

Accuracy ±2.0 µm ±2.0 µm ±2.0 µm @ 3 sigma ±2.0 µm @ 3 sigma

Bonding Area 56mm x 80mm 56mm x 80mm 56mm x 90mm Not specified

Compatible Wire - Gold, Copper Gold, Copper Gold, Alloy

Min. Bond Pad Pitch - 35µm 35µm -

Min. Loop Height <50µm As low as 50µm As low as 50µm -

Max. Loop Length - 7.6mm 7.6mm -

Machine Weight Approx. 566 kg Approx. 556 kg Approx. 590 kg -

Key Application Areas

With its broad process compatibility, the ICONN series meets diverse chip packaging requirements, primarily including:

Memory Devices: The IConn MEM PLUS model is specifically designed for memory devices; it is suitable for complex stacked-die wire bonding applications using gold and alloy wires, offering high quality and high throughput.

LED Packaging: This series is widely used for internal wire bonding in Light Emitting Diodes (LEDs) and small-to-medium power transistors. It supports various lead frame types—such as SMD, high-power LED, and DIP—making it a proven choice for LED packaging.

Discrete Devices and Integrated Circuits: Suitable for internal wire bonding of standard discrete devices (transistors, etc.), optical communication devices, and specialized semiconductor components.

Advanced Packaging: Suitable for ultra-fine pitch, ultra-low loop, stacked-die, Low-k dielectric material, and multi-layer packaging applications; capable of handling copper wire bonding challenges for advanced-node wafers (28nm and below). Core Features and Key Technologies

The ICONN series has achieved classic status thanks to several innovative technologies and designs:

Stable Precision and Quality: The system delivers a comprehensive precision of ±2.0 µm @ 3 sigma, consistently meeting the requirements for ultra-fine pitch pads (35 µm).

Flexible and Superior Looping Capabilities: Offers over 50 wire loop types to flexibly handle diverse applications. Key features include:

Standard Loop Set: Includes basic loops such as Standard, Original, and J-Wire, suitable for conventional short-loop applications.

ProLoop Advanced Looping: Features like K-Loop enable precise control over loop shapes through multi-segment adjustments.

Power Series Low-Loop Technology: Achieves ultra-low forward loops of less than 50 µm, which is critical for thin-profile packaging.

Leading Copper Wire Bonding Technology: The IConn ProCu PLUS model utilizes the ProCu5 process; through an optimized gas delivery system and programmable gas regulation, it enhances copper wire bonding throughput and yield while maintaining stability.

High-Efficiency System Intelligence:

Automatic BITS (Bond Integrity Test System): Equipped with an automatic BITS featuring 1 pF precision, the system autonomously learns and optimizes parameters to ensure reliable and stable bonding quality.

WAVI Illumination System: Features WAVI (Wide Angle Vertical Illumination); programmable red and blue lighting adjustments significantly improve image recognition and alignment accuracy on complex substrates.

Ease of Operation and Maintenance: Equipped with a 17-inch color LCD display and the familiar K&S user interface, ensuring a short learning curve. For experienced engineers, wire changeover takes less than 4 minutes, and product changeover (switching between different part numbers) takes less than 8 minutes, significantly boosting equipment utilization.

Market Positioning and Procurement Recommendations

Market Positioning: Within the K&S product portfolio, the ICONN series is clearly positioned as a mid-to-high-end mass production platform. The standard IConn and the upgraded IConn PLUS serve as mature, flagship models; leveraging reliable technology and stable throughput, they continue to deliver value in mid-range and select high-end mass production markets. Meanwhile, models such as the IConn ProCu PLUS and IConn MEM PLUS strengthen the company's presence in specialized high-end segments, including copper wire bonding and advanced memory packaging.

Industry Standing: Thanks to its exceptional stability, K&S holds a leading market share in the high-end ball bonder sector in mainland China—particularly in the memory market, where it commands a 70%–80% share. Its deep technical expertise and massive installed base provide a solid foundation for equipment maintenance and the secondary market.

Secondary Market: The ICONN series is highly active in the secondary market; models like the IConn PLUS—when in good condition—represent a pragmatic choice for packaging facilities looking to expand capacity or replace aging equipment. While platforms such as Moov and CAE Online are useful for sourcing, it is strongly recommended to engage a professional third-party inspection agency to conduct a comprehensive equipment assessment.

If you are interested in specific process parameters for the ICONN series in particular applications (such as LED packaging or memory chip stacking) or a comparison with other models, we can explore this further.