Browsing by Author "Li, Hung-Chun"

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On Effective Flip-Chip Routing via Pseudo Single Redistribution Layer
(2012-01-01)
Hsu, Hsin-Wu
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Chen, Meng-Ling
;
Chen, Hung-Ming
;
Li, Hung-Chun
;
Chen, Shi-Hao
Due to the advantage of flip-chip design in power distribution but controversial peripheral 10 placement in lower design cost, redistribution layer (RDL) is usually used for such interconnection. Sometimes RDL is so congested that the capacity for routing is insufficient. Routing therefore cannot be completed within a single layer even for manual routing. Although [2] proposed a routing algorithm that uses two layers of RDLs, but in practice the required routing area is a little more than one layer. We overcome this problem by adopting the concept of pseudo single-layer. With the heuristics for routing on mapped channels and observations on staggered pins to relieve vertical constraints, the area of 2-layer routing can be minimized and the routability is 100%. Comparisons of routing results between manual design, the commercial tool, and the proposed method are presented. We have shown the effectiveness on a real industrial case: it originally required fully manual design, the proposed method can finish RDL routing automatically and effectively.
Power-Switch Routing for Reducing Dynamic IR Drop in Multi-Domain MTCMOS Designs
(2014-01-01)
Wang, Yi-Ming
;
Chao, Mango C. -T.
;
Chen, Shi-Hao
;
Li, Hung-Chun
;
電子工程學系及電子研究所
This paper presents a switch-routing framework which can generate a feasible Hamiltonian-path switch routing while minimizing the dynamic IR drop of a targeted fragile active domain with an analytical model. The accuracy of the analytical model and the effectiveness of the proposed framework are validated through an advanced multi-domain mobile-phone MTCMOS design.