Stacked Multi-Chip Capsule Camera for Compact Storage

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Solution Overview

Problem

Existing capsule cameras with on-board storage face challenges in compactly packaging multiple chips and components such as sensors, light sources, and batteries within a small housing for easy swallowing, due to limited space and the need for high storage capacity and image resolution, while also requiring efficient image/video compression and motion metric evaluation.

Innovation Solution

The use of stacked multi-chip packaging technology, including semiconductor non-volatile memory chips and system processing chips, with advanced interconnection methods like die bonding and system bus architecture, to reduce physical dimensions and connection nodes, allowing for efficient image/video compression and storage within a compact capsule camera housing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If multiple non-volatile memory chips and processing chips are used to provide sufficient storage capacity and image resolution, then the storage capacity and image quality are improved, but the device size and packaging complexity increase

Engineering Contradiction:
Improvestorage capacityVSAvoidcapsule size
Core Design Contradiction:
Quantity of substanceVSVolume of moving object

Solution Approach 1:

The patent transitions from planar chip arrangement to three-dimensional stacked packaging, where multiple memory chips and processing chips are vertically stacked and interconnected through TSV (through-silicon via) technology. This dimensional change allows sufficient storage capacity and processing power to be achieved within a dramatically reduced footprint, enabling the capsule to maintain small size while accommodating multiple high-capacity memory chips and processing units.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent implements nested packaging where smaller components are integrated within larger structures. Multiple memory chips are stacked within a compact package, with each chip containing embedded storage layers. The processing chips are nested within the same vertical stack, creating a densely integrated multi-chip module that maximizes component density while minimizing overall capsule volume.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Length of moving object

If multiple chips are packaged in a compact means to reduce capsule size, then the ease of swallowing is improved, but the device complexity and interconnection requirements increase

Engineering Contradiction:
Improvecapsule dimensionVSAvoidchip interconnection
Core Design Contradiction:
Length of moving objectVSDevice complexity

Solution Approach 1:

The patent merges multiple separate chip interconnection functions into a unified TSV-based interconnect structure. Through-silicon vias provide both mechanical support and electrical interconnection between stacked chips, eliminating the need for separate bonding wires or trace routing. This consolidation reduces interconnection complexity while enabling compact three-dimensional chip stacking, thereby reducing overall capsule dimensions.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces TSV (through-silicon via) technology as an intermediary structure that facilitates communication between stacked memory chips and processing chips. These vertical interconnects act as mediators, providing efficient data pathways through the chip stack without requiring complex lateral routing. This intermediary approach simplifies the interconnection architecture while enabling compact packaging.

Inventive Principle:
Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach enables the compact integration of multiple chips and components, reducing the overall size and connection complexity, thereby facilitating easy swallowing and effective image storage and processing within the capsule camera, enhancing its diagnostic capabilities with high-resolution images.

Implementation Method 1

advanced interconnection methods like die bonding

Methodology Applied
Scientific EffectDie bonding: Welding

Data Source

PatentUS8472795B2System and method for capsule camera with on-board storage
Publication Date: 2013.06.25 CAPSOVISION INC
  • US8472795B2 patent drawing
  • US8472795B2 patent drawing
  • US8472795B2 patent drawing

AI summary

A capsule camera with on-board storage to archive the captured images in on-board non-volatile memory is disclosed. The capsule camera with on-board storage comprises multiple chips including a system processing chip and one or more non-volatile memory chips, where the system processing chip includes a compression module to compress images captured. If the multiple chips use individual chip packages and are disposed on respective printed circuit boards according to a conventional approach, it would require too much space to fit the multiple chips into the capsule camera housing. Accordingly, a capsule camera embodying the present invention is disclosed where the capsule camera integrates an image sensor, a light source, at least one system processing chip comprising compression module, one or more non-volatile memory chips and a battery into a housing, wherein the at least one system processing chip and said one or more non-volatile memory chips are disposed vertically in a multiple chip assembly.