Samsung rozpoczyna masową produkcję pamięci DDR4 z 3D TSV
Koreański gigant będzie wytwarzał pierwsze w branży 64-gigabajtowe moduły pamięci RDIMM (Registered Dual Inline Memory Modules) DDR4, wykorzystujące trójwymiarową (3D) technologię pakietów określaną jako „through silicon via” (TSV). Może to przyspieszyć przejście z DDR3 na DDR4.

Moduły zaprojektowano do serwerów klasy Enterprise i aplikacji chmurowych. Nowa pamięć RDIMM zawiera 36 czipów DDR4 DRAM, z których każdy składa się z czterech 4-gigabitowych (Gb) układów scalonych DDR4 DRAM. Czipy o niskim poborze energii produkowane są w 20-nanometrowym procesie technologicznym, z wykorzystaniem technologii pakietów 3D TSV, która polega na pionowym łączeniu spiętrzonych układów scalonych.
Aby stworzyć pakiet pamięci DRAM 3D TSV DRAM, układy scalone DDR4 są szlifowane do kilkudziesięciu mikrometrów, a następnie nakłuwane, tak by posiadały setki malutkich otworków. Potem są łączone pionowo za pomocą elektrod przechodzących przez otwory. Dzięki temu moduł 64 GB pamięci TSV działa według producenta dwukrotnie szybciej niż moduł 64 GB z pakietami połączonymi przewodami, a jego zużycie energii jest o około połowę niższe.
W przyszłości Samsung zamierza wykorzystać technologię 3D TSV do spiętrzenia więcej niż czterech układów scalonych DDR4, co pozwoli stworzyć moduły DRAM o jeszcze większej gęstości. Ma to przyspieszyć ekspansję na rynku tych pamięci i przejście z DDR3 na DDR4 w serwerach.
Według Gartnera światowy rynek pamięci DRAM osiągnie do końca roku wartość 38,6 mld dol., a w przeliczeniu na pojemność – 29,8 mld jednostek (odpowiednik 1 GB). Na rynek serwerów ma przypadać w tym roku ponad 20 procent produkcji pamięci DRAM, tj. ok. 6,7 mld jednostek.
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