Nittobo announced approximately ¥15 billion of glass-cloth investment. The planned addition makes qualified low-thermal-expansion cloth a credible upstream consideration, but the announcement does not quantify qualified output or establish a shortage through 2028.
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The fiscal-2026 Q4 production start is a plan, not a completed event.
Ibiden announced an approximately ¥500 billion investment plan for high-performance IC package substrates over FY2026–FY2028. A separate project notice describes approximately ¥220 billion of planned investment. These commitments are a substantial supply response to substrate demand, though spending does not itself establish customer-qualified SAP output.
On its second-quarter earnings call, TSMC chief executive C.C. Wei said packaging capacity was so tight that it limited customers’ growth. This establishes a contemporaneous commercial constraint, but does not identify the constrained subprocess or prove scarcity in 2028.
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By Intermission· 1,966 words
Which specific AI packaging or substrate process will remain supply-constrained through 2028?
Nittobo announces glass-cloth expansion
[15]Nittobo announced approximately ¥15 billion of glass-cloth investment. The planned addition makes qualified low-thermal-expansion cloth a credible upstream consideration, but the announcement does not quantify qualified output or establish a shortage through 2028.
The fiscal-2026 Q4 production start is a plan, not a completed event.
Ibiden announces major substrate investment
[5][6]Ibiden announced an approximately ¥500 billion investment plan for high-performance IC package substrates over FY2026–FY2028. A separate project notice describes approximately ¥220 billion of planned investment. These commitments are a substantial supply response to substrate demand, though spending does not itself establish customer-qualified SAP output.
TSMC says packaging capacity limits customer growth
[8]On its second-quarter earnings call, TSMC chief executive C.C. Wei said packaging capacity was so tight that it limited customers’ growth. This establishes a contemporaneous commercial constraint, but does not identify the constrained subprocess or prove scarcity in 2028.
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