Auto-Boating Tape Substrate Tabs Prevent Edge Jamming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The auto-boating process for attaching integrated circuit dies to tape substrates often results in substrate bowing and warping due to the coiling effect when the substrate is sandwiched between a boat and a clip, leading to yield loss as the edges get jammed with clip windows, causing the edges of the tape substrate to be scrapped.
Innovation Solution
The introduction of protrusions or tabs at the corners of the tape substrate, which extend beyond the lateral edges, prevents contact with the clip windows, allowing the substrate to slide into place without bowing or warping, thereby maintaining the substrate's planarity and preventing edge jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the tape substrate is sandwiched between the boat and the clip in the auto-boating process, then the die attach process is enhanced, but the substrate edges get jammed with the clip windows causing bowing and warping
Solution Approach 1:
The substrate is segmented into functional zones by adding guide strips with tabs at specific locations. These tabs act as discrete elements that interact with the clip windows to prevent edge jamming, while the rest of the substrate remains available for die attachment. This segmentation allows the system to maintain both the sandwiching benefit and the planarity requirement.
Solution Approach 2:
The guide strips with tabs serve as intermediary elements between the substrate edges and the clip windows. These tabs contact the clip windows first, acting as mediators that prevent the substrate edges from being jammed directly against the clip windows, thereby eliminating bowing and warping while allowing the sandwiching process to proceed.
2Stability of the object's composition
If the substrate edges contact the clip windows during sandwiching, then the substrate is secured, but bowing and warping occur along the edges
Solution Approach 1:
The guide strips with tabs are pre-positioned on the substrate before the sandwiching process. These tabs are designed to contact the clip windows in advance during the sandwiching operation, creating a preliminary action that guides the substrate into proper alignment and prevents edge contact with the clip windows, thereby preventing bowing and warping before they can occur.
Solution Approach 2:
The tabs on the guide strips act as intermediary contact points that interact with the clip windows. Instead of the substrate edges directly contacting the clip windows (which causes bowing), the tabs serve as intermediaries that maintain proper spacing and alignment, securing the substrate while preserving its planarity.
3Measurement precision
If the substrate is secured tightly by the clip, then positioning accuracy is improved, but edge jamming with clip windows increases
Solution Approach 1:
The substrate system is segmented to include guide strips with tabs that are positioned at specific locations away from the edges. These segmented elements provide the necessary contact points for accurate positioning and secure the substrate without causing edge jamming, as the tabs are separated from the substrate edges that would otherwise contact the clip windows.
Solution Approach 2:
The tabs on the guide strips serve as intermediary elements that provide secure contact with the clip windows for accurate positioning. These intermediaries allow the substrate to be held firmly in place while preventing the substrate edges from being jammed against the clip windows, thereby eliminating the harmful edge jamming effect.
Data Source
AI summary
According to one embodiment of the invention, a system used in auto-boating includes a tape substrate supported by a boat. The tape substrate includes a pair of lateral edges parallel to one another and each having respective first and second ends, and a pair of longitudinal guide strips parallel to one another. One of the longitudinal guide strips extends between the respective first ends of the pair of lateral edges and the other longitudinal guide strip extends between the respective second ends of the pair of lateral edges. The tape substrate also includes a plurality of die attach regions disposed within the area defined by the pair of lateral edges and the pair of longitudinal guide strips. The system further includes a boat clip coupled to the boat such that the tape substrate is sandwiched between the boat and the boat clip. Each longitudinal guide strip includes a pair of tabs disposed at opposite ends thereof such that each tab extends beyond a respective one of the lateral edges.